Nov. 25, 2024
S27E142: Martian Moon Origins, Starship's Sixth Triumph, and Earth's Ore Age Revelation
SpaceTime Series 27 Episode 142
*How Mars Got Its Moons
A groundbreaking study suggests that Mars acquired its moons, Phobos and Deimos, after a passing asteroid was torn apart by the planet's gravity. This new hypothesis, based on NASA's...
SpaceTime Series 27 Episode 142
*How Mars Got Its Moons
A groundbreaking study suggests that Mars acquired its moons, Phobos and Deimos, after a passing asteroid was torn apart by the planet's gravity. This new hypothesis, based on NASA's supercomputer simulations and published in the journal Icarus, challenges previous theories of their origin, such as capture or major impact. The upcoming Martian Moons Exploration mission by JAXA, with NASA's involvement, aims to further investigate these theories by collecting samples from Phobos.
*Starship Test Flight 6
SpaceX has successfully completed its sixth test flight of the Starship Mega rocket, overseen by SpaceX CEO Elon Musk and U.S. President-elect Donald Trump. The test included a splashdown of the booster in the Gulf of Mexico and a successful orbital journey of the Starship, which trialled new heat shield materials and descent strategies. This marks the final test for this version of Starship, with an upgraded version expected to fly soon.
*Revisiting Earth's Ore Deposits
New research reveals that the largest iron ore deposits in Western Australia's Pilbara are around a billion years younger than previously thought. Using advanced geochronology techniques, scientists have dated these deposits to between 1.1 and 1.4 billion years, reshaping our understanding of Earth's geological history and aiding future exploration efforts.
The Science Report
A study suggests that a daily hour-long walk for those over 40 could extend life expectancy by five years. Meanwhile, global plastic waste is projected to double by mid-century, but a combination of policies could reduce it by 90%. Additionally, switching to a vegan diet could lower food costs by 19%, unlike the Mediterranean diet. The Bent Spoon Award was given to the Cancer Council of Western Australia for endorsing pseudoscientific practices like Richie.
www.spacetimewithstuartgary.com
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00:00 New study suggests Mars got its two moons after asteroid was torn apart
04:57 SpaceX has undertaken a successful sixth test flight of its Starship Mega rocket
08:17 Super heavy booster is attempting an offshore landing off the Gulf coast of Texas
10:18 The next milestone is Starship uh, is in terminal guidance
14:29 Starship is approaching the peak heating phase of entry
19:56 SpaceX's Starship rocket successfully carried its first ever biological payload
23:07 A new study finds planet Earth's largest iron ore deposits are younger than previously thought
33:14 A new study looked at physical activity and life expectancy
35:54 Western Australian Cancer Council endorsed pseudo medical and...
*How Mars Got Its Moons
A groundbreaking study suggests that Mars acquired its moons, Phobos and Deimos, after a passing asteroid was torn apart by the planet's gravity. This new hypothesis, based on NASA's supercomputer simulations and published in the journal Icarus, challenges previous theories of their origin, such as capture or major impact. The upcoming Martian Moons Exploration mission by JAXA, with NASA's involvement, aims to further investigate these theories by collecting samples from Phobos.
*Starship Test Flight 6
SpaceX has successfully completed its sixth test flight of the Starship Mega rocket, overseen by SpaceX CEO Elon Musk and U.S. President-elect Donald Trump. The test included a splashdown of the booster in the Gulf of Mexico and a successful orbital journey of the Starship, which trialled new heat shield materials and descent strategies. This marks the final test for this version of Starship, with an upgraded version expected to fly soon.
*Revisiting Earth's Ore Deposits
New research reveals that the largest iron ore deposits in Western Australia's Pilbara are around a billion years younger than previously thought. Using advanced geochronology techniques, scientists have dated these deposits to between 1.1 and 1.4 billion years, reshaping our understanding of Earth's geological history and aiding future exploration efforts.
The Science Report
A study suggests that a daily hour-long walk for those over 40 could extend life expectancy by five years. Meanwhile, global plastic waste is projected to double by mid-century, but a combination of policies could reduce it by 90%. Additionally, switching to a vegan diet could lower food costs by 19%, unlike the Mediterranean diet. The Bent Spoon Award was given to the Cancer Council of Western Australia for endorsing pseudoscientific practices like Richie.
www.spacetimewithstuartgary.com
www.bitesz.com
🌏 Get Our Exclusive NordVPN deal here ➼ www.bitesz.com/nordvpn. Enjoy incredible discounts and bonuses! Plus, it’s risk-free with Nord’s 30-day money-back guarantee! ✌
Check out our newest sponsor - Old Glory - Iconic Music and Sports Merch and now with official NASA merch. Well worth a look....
Become a supporter of this Podcast for as little as $3 per month and access commercial-free episodes plus bonuses: https://www.spreaker.com/podcast/spacetime-with-stuart-gary--2458531/support
or visit our Support page for more options and details: https://spacetimewithstuartgary.com/about
00:00 New study suggests Mars got its two moons after asteroid was torn apart
04:57 SpaceX has undertaken a successful sixth test flight of its Starship Mega rocket
08:17 Super heavy booster is attempting an offshore landing off the Gulf coast of Texas
10:18 The next milestone is Starship uh, is in terminal guidance
14:29 Starship is approaching the peak heating phase of entry
19:56 SpaceX's Starship rocket successfully carried its first ever biological payload
23:07 A new study finds planet Earth's largest iron ore deposits are younger than previously thought
33:14 A new study looked at physical activity and life expectancy
35:54 Western Australian Cancer Council endorsed pseudo medical and...
The Astronomy, Space, Technology & Science News Podcast.
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00:00:00,492 --> 00:00:05,375
This is Space Time, Series 27,
Episode 142, for broadcast on
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00:00:05,395 --> 00:00:10,599
the 25th of November, 2024.
Coming up on Space Time, how the
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00:00:10,659 --> 00:00:15,422
red planet Mars got its moons,
our full report on Starship Test
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00:00:15,442 --> 00:00:19,985
Flight 6, and a billion year
shift in the formation of planet
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00:00:20,045 --> 00:00:24,308
Earth's largest ore deposits.
All that and more coming up on
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00:00:24,388 --> 00:00:25,269
Space Time.
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00:00:26,530 --> 00:00:29,592
Welcome to Space Time with
Stuart Gary.
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A new study suggests that Mars
got its two moons, Phobos and
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00:00:49,463 --> 00:00:53,185
Deimos, after a passing asteroid
was ripped apart by the red
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00:00:53,265 --> 00:00:57,126
planet's gravity. The findings
reported in the journal Icarus
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00:00:57,327 --> 00:01:01,825
are based on new supercomputer
simulations by NASA. Besides the
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Earth's Moon, Phobos and Deimos
are the only moons in our solar
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00:01:05,227 --> 00:01:07,529
system that orbit a terrestrial
planet.
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Previous hypotheses have
suggested that the two tiny
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moons were either captured
main-built asteroids, or the
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result of a major asteroid
impact on the Martian surface,
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00:01:17,318 --> 00:01:20,220
possibly on the planet's
northern hemisphere lowlands.
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That latter explanation better
accounts for the paths the moons
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travel today, in these circular
orbits that closely align with
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the Martian equator.
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The problem is a giant impact
usually ejects material into a
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disk that mostly stays close to
the planet, and the Martian
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Moons, especially Deimos, are
orbiting quite a bit further out
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from the planet, and so probably
formed at their current
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distance.
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The new study, using a series of
supercomputer simulations,
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suggests another option, the
destruction of an asteroid that
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ventured too close to Mars,
pushing through its Roche limit,
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where gravitational tidal
disruptions tore the asteroid
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apart. The new modelling shows
the resulting rocky fragments
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from the asteroid's destruction
would have been strewn into a
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variety of orbits around Mars.
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More than half those fragments
would have escaped the Mars
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system completely, but others
would have stayed in orbit.
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Tugged by the gravity of both
Mars and the Sun, some of these
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remaining pieces would have
collided with one another, and
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every encounter would have
further ground them down,
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turning them into even more
debris.
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Many collisions later, smaller
chunks from the former asteroid
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would have settled into a debris
disk circling the planet like a
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ring. And over time, some of
this material would eventually
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have coalesced, accreting to
ultimately form Phobos and
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Deimos.
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To assess whether this was a
realistic chain of events, the
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authors explored hundreds of
different close-encounter
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simulations, varying the
asteroid's size, spin, speed and
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distance at its closest approach
to the red planet. Now in many
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of these scenarios, enough
asteroid fragments survived and
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collided in orbit to serve as
the raw material to form the two
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moons.
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The study's lead author, Jacob
Kagaras from NASA's Ames
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00:03:04,849 --> 00:03:07,890
Research Center in California's
Silicon Valley, says this new
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00:03:07,950 --> 00:03:10,031
model makes different
predictions about the two
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moons'properties, and these can
be tested against standard ideas
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for this key event in Martian
history. The new hypothesis also
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allows for a more efficient
distribution of Moon-making
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material to the outer regions of
the debris disk.
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And that means a much smaller
parent asteroid could still
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deliver enough material to send
the Moon's building blocks to
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the right place. Testing
different ideas about the
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formation of the two Martian
Moons is the primary goal of the
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upcoming Martian Moons
Exploration or MMX sample return
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mission which will be led by
JAXA, the Japanese Aerospace
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Exploration Agency.
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The spacecraft will survey both
Deimos and Phobos before
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eventually collecting samples
from the surface of Phobos to
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bring back to Earth for study. A
NASA instrument aboard the
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00:03:55,628 --> 00:03:59,190
spacecraft called MIGAIN, short
for Mars Moon Exploration with
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Gamma Rays and Neutrons, will
identify the chemical elements
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Phobos is made of and help
select sites for the sample
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collection.
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And some of these samples will
be collected by a pneumatic
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00:04:09,756 --> 00:04:13,157
sampler also provided by NASA as
a technology demonstration
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00:04:13,218 --> 00:04:16,719
contribution to the mission.
Understanding what the Martian
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00:04:16,759 --> 00:04:19,941
Moons are made of, is one clue
which could distinguish between
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00:04:19,961 --> 00:04:23,483
the moons having an asteroid
origin or a planet plus impactor
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00:04:23,583 --> 00:04:24,003
origin.
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00:04:24,864 --> 00:04:29,646
This is Space Time. Still to
come, SpaceX undertakes a
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00:04:29,666 --> 00:04:33,208
successful sixth test flight of
its Starship Mega Rocket, and a
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00:04:33,268 --> 00:04:37,190
new study shows a billion-year
shift in the formation of planet
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00:04:37,230 --> 00:04:40,591
Earth's largest ore deposits.
All that and more still to come
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00:04:40,891 --> 00:04:41,872
on Space Time.
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00:04:58,016 --> 00:05:01,238
SpaceX has undertaken a
successful sixth test flight of
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00:05:01,238 --> 00:05:04,360
its Starship Mega Rocket, with
United States President-elect
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00:05:04,400 --> 00:05:08,182
Donald Trump joining space
ex-boss Elon Musk to witness the
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00:05:08,222 --> 00:05:10,103
spectacular launch firsthand.
87
00:05:10,363 --> 00:05:11,604
Flight director is go for
launch.
88
00:05:13,545 --> 00:05:17,307
T-minus 20 seconds until liftoff
of Starship Flight 6.
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00:05:17,987 --> 00:05:25,692
9, 6, 7, 6, 5, 4, 3, 2, 1.
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00:05:32,159 --> 00:05:32,759
We got puts in.
91
00:05:34,240 --> 00:05:35,580
Vehicle with pitch and gale
range.
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00:05:35,580 --> 00:05:37,441
2-star Raptor, telemetry
nominal.
93
00:05:37,602 --> 00:05:39,943
2-star and 5th, avionics, power
and telemetry nominal.
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00:05:40,323 --> 00:05:44,425
All right, we are just a little
over a minute. We're about six
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00:05:44,505 --> 00:05:47,467
miles away, so all the sound's
still hitting us here. Hearing
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00:05:47,487 --> 00:05:50,829
good call-outs at power,
telemetry nominal. That's flying
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00:05:50,849 --> 00:05:55,111
straight and true. We do see all
33 Raptor engines lit up on
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00:05:55,191 --> 00:05:56,292
telemetry screens.
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00:05:56,668 --> 00:05:59,430
At this point, we've passed
through that point of maximum
100
00:05:59,490 --> 00:06:03,433
aerodynamic pressure, that max
Q. Now coming up in just a
101
00:06:03,633 --> 00:06:07,435
little over a minute from now is
going to be hot staging. So
102
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we're going to see the six
engines on the ship ignite while
103
00:06:11,458 --> 00:06:14,340
still attached to the booster.
Just before that, we'll see all
104
00:06:14,440 --> 00:06:17,102
but three center engines on the
booster shut down.
105
00:06:17,322 --> 00:06:20,644
In what we call MECO, it's most
engines cut off instead of main
106
00:06:20,704 --> 00:06:23,706
engine. A lot of our flight
controllers looking at all the
107
00:06:23,766 --> 00:06:27,028
systems around the tower. Again,
we have to send... A manual
108
00:06:27,088 --> 00:06:32,031
command. We heard the tower is
go for catch. We've heard the
109
00:06:32,091 --> 00:06:33,971
return flag is set for true.
110
00:06:34,452 --> 00:06:36,392
Dependent from setup, stage
declaration.
111
00:06:36,613 --> 00:06:39,074
All right. Hot staging
confirmed. Checked out a sick
112
00:06:39,234 --> 00:06:42,515
lit on the ship. Booster boost
back going. We heard that we are
113
00:06:42,595 --> 00:06:45,537
go for catch. Kate, Jesse, take
good reviews. Hopefully I got a
114
00:06:45,557 --> 00:06:47,277
booster coming home real soon.
115
00:06:47,497 --> 00:06:50,959
Right now it is performing the
boost back burn. Good news there
116
00:06:51,019 --> 00:06:53,060
telling us that the pressures
are.
117
00:06:53,220 --> 00:06:57,141
Inside the ship are good that is
the second stage or the upper
118
00:06:57,201 --> 00:07:00,283
portion of the vehicle yeah
booster is currently a super
119
00:07:00,303 --> 00:07:03,584
heavy is currently in its boost
back burn this boost back burn
120
00:07:05,324 --> 00:07:08,505
this boost back burn lasts just
a little bit over a minute
121
00:07:08,585 --> 00:07:12,007
however a loss of communication
with a launch tower computer at
122
00:07:11,987 --> 00:07:15,088
the bokeh chica Starbase in
Texas meant they were prevented
123
00:07:15,128 --> 00:07:18,250
from seeing a repeated the
previous test's spectacular
124
00:07:18,310 --> 00:07:21,272
super-heavy booster returning to
the launch pad and being
125
00:07:21,332 --> 00:07:23,915
captured by the launch tower's
chopstick arms.
126
00:07:24,575 --> 00:07:27,618
So instead, the first stage was
instructed to undertake a
127
00:07:27,658 --> 00:07:30,620
vertical landing at sea
splashing down in the Gulf Of
128
00:07:30,660 --> 00:07:34,043
Mexico. But all other aspects of
the flight appeared to go
129
00:07:34,143 --> 00:07:37,606
according to plan, with a hot
staging separation of the upper
130
00:07:37,686 --> 00:07:40,808
Starship orbital section from
the booster section performing
131
00:07:40,889 --> 00:07:41,369
nominally.
132
00:07:42,029 --> 00:07:45,512
The booster then undertook its
boost-back re-entry burn Using
133
00:07:45,532 --> 00:07:47,993
its underbelly heat shield to
belly flop through the
134
00:07:48,053 --> 00:07:51,095
atmosphere to burn off speed
during the re-entry and then
135
00:07:51,255 --> 00:07:54,216
flipping from the horizontal
back to the vertical at the last
136
00:07:54,296 --> 00:07:57,757
minute for a perfectly executed
landing burn and touchdown on
137
00:07:57,757 --> 00:07:58,838
the sea surface.
138
00:07:58,978 --> 00:08:00,278
Booster off or divert.
139
00:08:00,399 --> 00:08:03,300
The hot stage has been
jettisoned.
140
00:08:03,660 --> 00:08:05,321
Yes, visual confirmation of
that.
141
00:08:05,421 --> 00:08:07,241
Starhip is following a nominal
trajectory.
142
00:08:07,442 --> 00:08:10,503
The next step for booster is
going into that landing burn.
143
00:08:10,543 --> 00:08:14,164
Again, it'll light up 13 of
those engines. And then pared
144
00:08:14,184 --> 00:08:17,206
down to three engines right
before booster catch.
145
00:08:17,266 --> 00:08:19,507
All right. Now, just real quick,
we did hear the call out,
146
00:08:19,667 --> 00:08:22,528
booster offshore divert.
Unfortunately, that means that
147
00:08:22,548 --> 00:08:26,470
we are no go for the catch. Both
the tower and the vehicle, as
148
00:08:26,550 --> 00:08:30,071
well as the operators on
console, have been actively
149
00:08:30,411 --> 00:08:34,633
evaluating the commit criteria
for that return to the launch
150
00:08:34,693 --> 00:08:38,915
tower. And unfortunately, we did
not have a pass on those commit
151
00:08:38,955 --> 00:08:41,536
criteria. So we are no go for
tower catch.
152
00:08:41,736 --> 00:08:44,238
There's a lot of things that
need to go well in order to line
153
00:08:44,258 --> 00:08:47,419
that up. Unfortunately, today we
won't forego booster catch
154
00:08:47,519 --> 00:08:50,241
today. We have an additional
objective today to do an
155
00:08:50,401 --> 00:08:54,344
in-space relight of a Raptor
engine, which again will help us
156
00:08:54,624 --> 00:08:59,246
set us up for being able to do
deorbit burns, which is
157
00:08:59,287 --> 00:09:00,787
important for orbital flights.
158
00:09:00,827 --> 00:09:03,869
Yeah, once again, we are
attempting an offshore landing
159
00:09:04,029 --> 00:09:08,672
of the super heavy booster off
the Gulf Coast of Texas. Those
160
00:09:08,712 --> 00:09:11,513
grid fins, there are four
hypersonic grid fins. Oh, we can
161
00:09:11,553 --> 00:09:15,235
see that the landing run has
begun. This is a heavy booster.
162
00:09:15,455 --> 00:09:18,837
Same padding, 13 engines will
light. Calm down to three, just
163
00:09:18,877 --> 00:09:21,978
as we expected. Splash down.
Super heavy.
164
00:09:22,358 --> 00:09:26,020
So we'd like to confirm a water
landing once again for the super
165
00:09:26,100 --> 00:09:26,980
heavy booster.
166
00:09:27,141 --> 00:09:29,942
Meanwhile, the Starship Upper
Stage continued to climb to
167
00:09:30,022 --> 00:09:32,863
orbit, cruising halfway around
the planet before re-entering
168
00:09:32,863 --> 00:09:36,025
the atmosphere above the Indian
Ocean off the Western Australian
169
00:09:36,105 --> 00:09:39,574
coastline. The test included
reigniting one of Starship's
170
00:09:39,654 --> 00:09:42,274
Raptor engines for the first
time in space.
171
00:09:42,474 --> 00:09:45,155
It's going to attempt to do an
in-space burn. We're going to
172
00:09:45,195 --> 00:09:47,996
light one of those Raptor
engines, the sea-level ones in
173
00:09:47,976 --> 00:09:50,437
the middle, just to help
demonstrate that we can relight
174
00:09:50,597 --> 00:09:53,698
in that microgravity
environment. Really critical for
175
00:09:53,918 --> 00:09:57,218
de-orbit burns. We start to do
some orbital missions in the
176
00:09:57,218 --> 00:10:00,319
not-too-distant future. And then
following that, we'll see a ship
177
00:10:00,419 --> 00:10:02,560
entry, maybe a splashdown.
178
00:10:02,880 --> 00:10:05,721
As you guys said, we're really
going to be pushing ship on this
179
00:10:05,861 --> 00:10:08,001
one. We're... Pretty much
intentionally putting it in
180
00:10:08,021 --> 00:10:11,342
places where we expect it might
not do so great. And all that's
181
00:10:11,342 --> 00:10:14,423
to try and help us learn, see if
we're a little too conservative.
182
00:10:14,543 --> 00:10:17,144
And then maybe that opens up
more capability for when we
183
00:10:17,164 --> 00:10:17,884
start catching them.
184
00:10:18,064 --> 00:10:23,206
The next milestone is Starship
Terminal Guidance, referring to
185
00:10:23,226 --> 00:10:28,987
the upper stage. At about 8
minutes, 35 seconds or so, we
186
00:10:29,327 --> 00:10:33,069
have Ship Engine Cutoff, which
will be the cutoff of the Raptor
187
00:10:33,169 --> 00:10:33,589
engines.
188
00:10:34,885 --> 00:10:38,007
And there we just heard a call
out for SECO Ship Engine Cutoff.
189
00:10:38,107 --> 00:10:39,688
Everything continuing to look
awesome.
190
00:10:40,229 --> 00:10:43,211
Fts in place. Nominal orbit
insertion.
191
00:10:43,231 --> 00:10:46,593
There's that call out. We were
waiting for confirmation of good
192
00:10:46,813 --> 00:10:48,775
orbital insertion for ship
today.
193
00:10:49,095 --> 00:10:51,997
Ship nominal orbit. So it's on
its way around the planet.
194
00:10:52,117 --> 00:10:54,419
And trialing new heat shield
materials.
195
00:10:54,599 --> 00:10:57,701
As a reminder, one of the main
goals of today's flight test is
196
00:10:57,841 --> 00:11:01,704
for the ship to make it through
the extreme heat of reentry and
197
00:11:01,724 --> 00:11:05,326
to do so in a controlled manner.
Now, reentry is typically a
198
00:11:05,366 --> 00:11:08,908
portion of flight where we don't
have communication capability
199
00:11:09,028 --> 00:11:13,110
with the spacecraft because it's
reentering at or around orbital
200
00:11:13,150 --> 00:11:18,093
velocity, which is roughly eight
kilometers per second or about
201
00:11:18,233 --> 00:11:19,874
five miles per second.
202
00:11:20,354 --> 00:11:24,056
Now, at those speeds, yep,
pretty fast. The spacecraft is
203
00:11:24,116 --> 00:11:27,738
moving through the atmosphere
rather quickly, and that results
204
00:11:27,858 --> 00:11:32,021
in friction. And this creates a
plasma field around the vehicle.
205
00:11:32,281 --> 00:11:36,024
That. Blanket of plasma distorts
communication frequency, so it's
206
00:11:36,064 --> 00:11:39,808
not uncommon to experience brief
blackouts in communication.
207
00:11:40,068 --> 00:11:42,570
Other thermal protection
experiments saw some areas
208
00:11:42,630 --> 00:11:45,673
stripped of their heat tiles to
see whether catch mechanisms
209
00:11:45,713 --> 00:11:47,915
could be positioned there on
future flights.
210
00:11:48,255 --> 00:11:52,619
The receding tile line where we
have removed a number of heat
211
00:11:52,659 --> 00:11:56,603
shield tiles in order to test
out and push the envelope on the
212
00:11:56,703 --> 00:11:59,025
ship and demonstrate what its
capabilities are.
213
00:11:59,165 --> 00:12:02,527
We are really pushing the ship
today. The heat shield is not in
214
00:12:02,527 --> 00:12:06,790
the same configuration as it was
last flight, where we had a team
215
00:12:06,810 --> 00:12:11,072
of ship techs do just an
otherworldly task, replacing the
216
00:12:11,092 --> 00:12:15,615
entire heat shield, thousands of
tiles, installing a backup of
217
00:12:15,655 --> 00:12:19,417
LATV, and that pretty much set
us up to do a pinpoint landing
218
00:12:19,437 --> 00:12:20,258
on Flight 5.
219
00:12:20,378 --> 00:12:23,600
We did not do that with this
one. We have some backup in
220
00:12:23,640 --> 00:12:26,902
those really sensitive areas
around the flat. But this is an
221
00:12:26,942 --> 00:12:30,044
older generation heat shield.
And knowing we weren't going to
222
00:12:30,024 --> 00:12:33,726
do that, we even went and
removed some extra tiles. There
223
00:12:33,746 --> 00:12:36,468
are some missing tiles on the
nose cone where we're testing
224
00:12:36,488 --> 00:12:37,209
some backups.
225
00:12:37,489 --> 00:12:40,972
There are some steel covered
tiles in a couple of different
226
00:12:41,032 --> 00:12:43,914
spots. And there's also a whole
lot more steel of the ship
227
00:12:44,054 --> 00:12:47,080
showing. A couple hundred tiles
trimmed off the sides, and that
228
00:12:47,080 --> 00:12:49,998
's where we might have catch
fittings in the future. But
229
00:12:50,198 --> 00:12:53,300
color is starting to come in.
Looks like things are going to
230
00:12:53,300 --> 00:12:54,521
start heating up, Kate and
Jesse.
231
00:12:54,721 --> 00:12:59,483
Yeah, fun fact, Dan, we actually
removed 2,100 heat shield tiles
232
00:12:59,843 --> 00:13:03,865
from Starship in order to
basically present that necessary
233
00:13:04,145 --> 00:13:08,647
receding line. We want to test
the vehicle beyond what we think
234
00:13:08,747 --> 00:13:12,268
it is capable of carrying based
on our simulations and
235
00:13:12,288 --> 00:13:13,049
calculations.
236
00:13:13,309 --> 00:13:16,450
So once again, don't be
surprised if we see some
237
00:13:16,530 --> 00:13:20,291
wackadoodle stuff happen here.
We won't be. There are a number
238
00:13:20,291 --> 00:13:24,313
of things that we are testing
out intentionally to see. What
239
00:13:24,353 --> 00:13:25,374
the ship can take.
240
00:13:25,934 --> 00:13:28,635
Yeah, exactly. And knowing what
those limits are will really
241
00:13:28,775 --> 00:13:32,397
help us design the vehicle of
the future. Essentially,
242
00:13:32,437 --> 00:13:35,038
removing those tiles helps us
remove a lot of weight from the
243
00:13:35,058 --> 00:13:37,279
vehicle, a lot of things that
might potentially need
244
00:13:37,359 --> 00:13:38,600
refurbishment in the future.
245
00:13:38,720 --> 00:13:43,202
And the goal is to come up with
a heat shield pattern or design
246
00:13:43,322 --> 00:13:46,664
that we don't have to refurbish.
We can just continue to use it
247
00:13:46,724 --> 00:13:50,045
over and over again. And that's
why we're... Changing some of
248
00:13:50,045 --> 00:13:53,407
those tiles and moving stuff
around, removing a lot of those
249
00:13:53,427 --> 00:13:55,449
tiles, as Kate has been
mentioning.
250
00:13:55,809 --> 00:13:58,751
Exactly. And, you know, looking
forward to the Starship
251
00:13:58,831 --> 00:14:00,952
capability of the future, we
want to be able to catch
252
00:14:01,052 --> 00:14:04,034
Starship like we do with
boosters. And so the next
253
00:14:04,054 --> 00:14:07,396
flight, we want to better
understand where we can install
254
00:14:07,516 --> 00:14:10,577
catch hardware, not necessarily
to actually do the catch, but to
255
00:14:10,657 --> 00:14:13,139
see how that hardware holds up
in those spots.
256
00:14:13,259 --> 00:14:16,401
And today's flight will help
inform, you know, does the...
257
00:14:16,885 --> 00:14:20,048
Stainless steel hold up like we
think it may based on
258
00:14:20,068 --> 00:14:22,590
experiments that we conducted on
Flight 5.
259
00:14:23,050 --> 00:14:26,393
And Starship was also programmed
to test a new, more aggressive
260
00:14:26,433 --> 00:14:29,596
descent strategy before flipping
vertically for the landing.
261
00:14:29,836 --> 00:14:33,039
Starship is at 85 kilometres.
Flaps now have control of the
262
00:14:33,039 --> 00:14:33,359
vehicle.
263
00:14:33,619 --> 00:14:37,403
The ship is beginning to
re-enter the Earth's atmosphere.
264
00:14:37,683 --> 00:14:40,765
Starship is approaching the peak
heating phase of entry. We've
265
00:14:40,805 --> 00:14:44,927
got kind of the next-gen ship
lined up for Flight 7. It's got
266
00:14:45,268 --> 00:14:47,749
all of those heat shield
upgrades and everything. And one
267
00:14:47,749 --> 00:14:49,890
of the things that we're going
to be doing that's most
268
00:14:49,950 --> 00:14:52,311
interesting and one of the
reasons we wanted daylight is
269
00:14:52,351 --> 00:14:55,673
we're going to be flying pretty
aggressively as ship comes in.
270
00:14:55,893 --> 00:14:58,395
We're going to be kind of nose
down. We've done it in wind
271
00:14:58,435 --> 00:14:58,775
tunnels.
272
00:14:58,815 --> 00:15:01,857
We've done it in simulations.
You might see the flaps really
273
00:15:02,157 --> 00:15:04,498
flapping around trying to
control the vehicle. We're
274
00:15:04,538 --> 00:15:08,160
betting we might have a little
bit more capability than think
275
00:15:08,200 --> 00:15:10,930
in just the analysis. But...
Always a chance that bed doesn't
276
00:15:10,930 --> 00:15:13,772
pay off, but that just helps us
know, like, what are our limits.
277
00:15:13,772 --> 00:15:16,694
Oh, it's halfway through the
peak heating phase of our trip.
278
00:15:16,694 --> 00:15:18,175
Halfway there. Halfway home,
guys.
279
00:15:18,395 --> 00:15:20,617
Just like the booster, it
re-entered the Earth's
280
00:15:20,677 --> 00:15:23,399
atmosphere horizontally,
bleeding off speed with its
281
00:15:23,499 --> 00:15:26,762
underbelly heat shield, and, as
we've seen on previous flights,
282
00:15:26,942 --> 00:15:30,625
displaying stunning plasma wave
patterns as it descended through
283
00:15:30,625 --> 00:15:31,405
the atmosphere.
284
00:15:32,106 --> 00:15:34,407
Interestingly, however,
sharp-eyed viewers would have
285
00:15:34,427 --> 00:15:37,469
noticed wrinkles or creases
developing on the exposed
286
00:15:37,630 --> 00:15:41,412
surface of the hull midsection
during the descent. It wasn't a
287
00:15:41,432 --> 00:15:44,473
major issue as the underlying
structure kept the whole thing
288
00:15:44,533 --> 00:15:46,714
together, but it was an
interesting point of
289
00:15:46,754 --> 00:15:47,475
observation.
290
00:15:47,975 --> 00:15:50,837
We are also testing out new
secondary thermal protection
291
00:15:51,177 --> 00:15:54,759
materials. So basically, like if
the heat shield isn't in this
292
00:15:54,839 --> 00:15:58,061
one spot, can this other
material protect the metal is
293
00:15:58,241 --> 00:16:00,962
the thinking there. Also
checking of the ship's
294
00:16:01,002 --> 00:16:04,424
structural strength in those
areas where we're looking to add
295
00:16:04,464 --> 00:16:06,145
that ship catch hardware.
296
00:16:06,613 --> 00:16:09,595
Just to see if it survives
entry. As we've been saying,
297
00:16:10,176 --> 00:16:14,359
we've done a lot of calculations
and simulations. Similar to
298
00:16:14,379 --> 00:16:18,361
Flight 5, we are targeting the
same splashdown location in the
299
00:16:18,461 --> 00:16:22,825
Indian Ocean, but we are not
expecting to recover the
300
00:16:22,825 --> 00:16:23,225
vehicle.
301
00:16:23,705 --> 00:16:27,088
The flaps so far are looking
pretty good. We're not seeing
302
00:16:27,368 --> 00:16:28,108
any burn through.
303
00:16:28,268 --> 00:16:30,390
Once we're subsonic,
essentially, so I think that's
304
00:16:30,450 --> 00:16:34,970
about 1,200 kilometers an hour.
Once we're down below that, that
305
00:16:34,970 --> 00:16:37,494
's when we're going to kind of
dip our nose down and get that
306
00:16:37,554 --> 00:16:39,095
more aggressive angle of attack.
307
00:16:39,255 --> 00:16:42,057
Normally we're just belly flop
right into the water, pretty
308
00:16:42,117 --> 00:16:45,779
much that position, but if we're
going to be able to do return to
309
00:16:45,879 --> 00:16:49,020
launch sites, we're going to
want to be able to fly with a
310
00:16:49,020 --> 00:16:51,221
little bit more of an angle of
attack, get you a little bit
311
00:16:51,282 --> 00:16:54,503
more range as you're coming
through. And so this will be
312
00:16:54,583 --> 00:16:57,745
just a test to see quite how far
can we push it.
313
00:16:58,025 --> 00:17:00,946
But obviously, we're going to do
these kind of tests way out here
314
00:17:01,026 --> 00:17:04,748
in super remote areas before you
ever try to bring a ship back to
315
00:17:04,768 --> 00:17:07,369
a place like Starbase. Our ship
remains on a good entry
316
00:17:07,449 --> 00:17:09,810
trajectory. External
temperatures are coming down.
317
00:17:09,870 --> 00:17:13,791
That tells us that we are
through the phase of peak
318
00:17:13,972 --> 00:17:17,853
heating. So we are expecting
these temperatures to continue
319
00:17:17,913 --> 00:17:22,755
to come down. Once again, we are
targeting a soft splashdown in
320
00:17:22,735 --> 00:17:26,957
the Indian Ocean off the
northwest coast of Australia.
321
00:17:27,297 --> 00:17:31,521
And as we get down a little bit
lower, the Raptor engines are in
322
00:17:31,521 --> 00:17:34,724
their chill phase right now. So
just essentially getting them
323
00:17:34,804 --> 00:17:38,567
primed to turn on. We're going
to use those three center
324
00:17:38,627 --> 00:17:42,390
engines to do a landing flip and
then a landing burn. So we'll
325
00:17:42,431 --> 00:17:45,293
come down kind of in that
slightly pointed down belly flop
326
00:17:45,293 --> 00:17:48,796
and then fire off those engines
to flip us around and then do
327
00:17:48,856 --> 00:17:52,059
that final landing burn. All
ship has paused.
328
00:17:52,119 --> 00:17:55,662
We do have some heating there.
On that looks like one of the
329
00:17:55,762 --> 00:18:00,387
forward flaps on Starship. This
is to be expected. We knew that
330
00:18:00,567 --> 00:18:03,690
the vehicle would perform
differently than what we had
331
00:18:03,770 --> 00:18:07,533
seen on Flight 5. It looks like
that heating is starting to cool
332
00:18:07,593 --> 00:18:08,013
off there.
333
00:18:08,354 --> 00:18:11,477
Yeah, it's a little burn
through. Again, it is important
334
00:18:11,577 --> 00:18:16,141
to note when we start seeing
that through the ship's descent.
335
00:18:16,401 --> 00:18:19,062
As well. So like Kate was
saying, we're getting some
336
00:18:19,082 --> 00:18:22,263
really good data here. Looks
like the other flaps are doing a
337
00:18:22,283 --> 00:18:24,543
little better than the one that
has a little burn through, which
338
00:18:24,563 --> 00:18:25,844
is some good news.
339
00:18:26,304 --> 00:18:27,884
It's slowing down on stock one.
340
00:18:27,984 --> 00:18:28,784
And go ahead, Anne.
341
00:18:28,784 --> 00:18:29,545
If it stops at the top.
342
00:18:29,605 --> 00:18:32,986
The body slope remains on a good
trajectory. This is when things
343
00:18:33,206 --> 00:18:35,426
will start to get a little
interesting. So this is when
344
00:18:35,486 --> 00:18:38,727
we're moving slower than the
speed of sound. Nose slowly
345
00:18:38,867 --> 00:18:41,468
start to tip down. And we're
going to try and maintain flap
346
00:18:41,528 --> 00:18:44,349
control the whole way. But we
are just a couple of minutes
347
00:18:44,369 --> 00:18:46,975
away from... Hopefully doing a
landing flip. Landing flip and
348
00:18:46,995 --> 00:18:49,437
landing burn if the flaps can
hold together.
349
00:18:49,637 --> 00:18:52,360
This higher angle of attack,
we're intentionally doing it to
350
00:18:52,540 --> 00:18:56,844
stress those aft flaps. And that
will help inform the limits of
351
00:18:56,964 --> 00:19:00,247
flap control in order to collect
data for future landing
352
00:19:00,307 --> 00:19:00,847
profiles.
353
00:19:01,107 --> 00:19:04,230
We're looking good so far. We've
just got about five kilometers
354
00:19:04,230 --> 00:19:06,953
in altitude to go. We'll ignite
the engines when we're still
355
00:19:06,993 --> 00:19:09,855
just a couple hundred meters
over the ground. Do that flip
356
00:19:10,115 --> 00:19:11,937
and landing. Five kilometers
out.
357
00:19:13,978 --> 00:19:17,039
As with previous test flights,
Starship flipped back to
358
00:19:17,079 --> 00:19:20,741
vertical just before splashing
down on target an hour and five
359
00:19:20,801 --> 00:19:23,902
minutes after launch. The whole
thing being monitored by a
360
00:19:23,942 --> 00:19:26,964
pre-positioned SpaceX buoy
anchored nearby.
361
00:19:27,564 --> 00:19:33,126
Ship is doing great so far.
Engine relighting.
362
00:19:34,947 --> 00:19:38,729
What a great real sensation by
Starship.
363
00:19:50,138 --> 00:19:54,219
All three down to two. And the
last one. Wow.
364
00:19:54,219 --> 00:19:56,460
And we have steps last down in
the Indian Ocean.
365
00:19:56,680 --> 00:20:00,082
And this flight also carried
Starship's first ever biological
366
00:20:00,142 --> 00:20:04,164
payload. It was a banana hanging
all by itself in the cavernous
367
00:20:04,264 --> 00:20:08,125
payload bay. Exactly why it was
put there has been the subject
368
00:20:08,145 --> 00:20:11,679
of some speculation. A camera
did monitor it throughout the
369
00:20:11,719 --> 00:20:15,722
flight, and importantly, it
didn't explode once in space.
370
00:20:16,342 --> 00:20:19,404
So it's fair to say the payload
bay must have remained pressure
371
00:20:19,464 --> 00:20:22,346
tight throughout the mission.
This launch also marked the
372
00:20:22,366 --> 00:20:25,709
quickest turnaround so far
between test flights for what is
373
00:20:25,729 --> 00:20:29,091
the world's largest and most
powerful rocket. And it was the
374
00:20:29,151 --> 00:20:32,613
last test flight for this
specific version of Starship.
375
00:20:33,234 --> 00:20:36,596
The next test will involve an
upgraded version to Starship,
376
00:20:36,716 --> 00:20:39,058
which will have a slightly
altered design with larger fuel
377
00:20:39,138 --> 00:20:39,518
tanks.
378
00:20:40,182 --> 00:20:43,084
Now, theoretically, that could
fly next month, although an
379
00:20:43,125 --> 00:20:46,667
actual launch date is yet to be
set. Meanwhile, work's already
380
00:20:46,748 --> 00:20:49,670
underway on a future third
variant of Starship, which will
381
00:20:49,670 --> 00:20:52,612
include engines three times more
powerful than those currently
382
00:20:52,732 --> 00:20:55,755
used. That should be ready to
fly in about a year.
383
00:20:56,916 --> 00:21:00,119
The massive, gleaming
121-metre-tall stainless steel
384
00:21:00,239 --> 00:21:03,281
rocket is at the heart of Musk's
plans to develop an
385
00:21:03,361 --> 00:21:07,264
interplanetary colonial
transport vehicle, one capable
386
00:21:07,304 --> 00:21:10,427
of carrying 100 people at a
time, on missions to the Moon,
387
00:21:10,647 --> 00:21:15,090
to Mars and beyond. In fact,
using Starship, Musk hopes to
388
00:21:15,130 --> 00:21:18,433
eventually turn humanity into
the first multi-planetary
389
00:21:18,533 --> 00:21:19,153
species.
390
00:21:19,834 --> 00:21:22,876
Current plans will see NASA use
a version of Starship called the
391
00:21:23,116 --> 00:21:26,098
HLS to ferry astronauts and
equipment between the Orion
392
00:21:26,198 --> 00:21:29,540
spacecraft and the Lunar South
Pole as part of the Artemis III
393
00:21:29,620 --> 00:21:31,522
mission in September 2026.
394
00:21:32,446 --> 00:21:35,168
After that, it'll be used to
shuttle people, supplies and
395
00:21:35,168 --> 00:21:38,109
equipment between the Lunar
Gateway Space Station, once it's
396
00:21:38,170 --> 00:21:41,772
positioned in trans-lunar orbit,
and the lunar surface, helping
397
00:21:41,812 --> 00:21:45,334
maintain a permanent human
presence on the Moon. And
398
00:21:45,434 --> 00:21:49,256
Starship doesn't end there. Musk
is also planning to fly an
399
00:21:49,296 --> 00:21:53,238
unmanned version of Starship to
Mars on a test run also in 2026.
400
00:21:53,959 --> 00:21:57,281
That'll coincide with the next
Mars transfer window. That's the
401
00:21:57,321 --> 00:22:00,042
time when the orbits of the
Earth and Mars allow for
402
00:22:00,103 --> 00:22:03,205
journeys between the two planets
to be kept out at just six or
403
00:22:03,245 --> 00:22:07,729
seven months each way. SpaceX
sees Starship as the future of
404
00:22:07,709 --> 00:22:11,993
the company. Eventually, it'll
replace the current Falcon 9 and
405
00:22:12,033 --> 00:22:15,195
Falcon Heavy vehicles, as well
as the Dragon capsule.
406
00:22:15,836 --> 00:22:19,359
And one day, it may even replace
some airline services on
407
00:22:19,459 --> 00:22:23,202
point-to-point journeys between
major cities on Earth, meaning
408
00:22:23,262 --> 00:22:26,385
any point on planet Earth will
be no more than 90 minutes from
409
00:22:26,505 --> 00:22:31,184
any other point. A true glimpse
into the future. This is Space
410
00:22:31,224 --> 00:22:31,664
Time.
411
00:22:32,364 --> 00:22:35,806
Still to come, a new study has
found that Earth's largest iron
412
00:22:35,866 --> 00:22:38,988
ore deposits, found in Western
Australia's Pilbara, are about a
413
00:22:39,048 --> 00:22:42,009
billion years younger than
previously thought. And later in
414
00:22:41,989 --> 00:22:46,051
the Science Report, a new study
warns that global plastic waste
415
00:22:46,251 --> 00:22:49,693
is likely to double by the
middle of this century. All that
416
00:22:49,713 --> 00:22:52,074
and more still to come on Space
Time.
417
00:23:07,934 --> 00:23:10,576
A new study has found that
plenty of the largest iron ore
418
00:23:10,576 --> 00:23:13,358
deposits, which are found in the
Western Australian Pilbara
419
00:23:13,358 --> 00:23:15,980
region, are about a billion
years younger than what was
420
00:23:16,060 --> 00:23:19,643
previously thought. The latest
data places that massive
421
00:23:19,683 --> 00:23:24,366
deposits are between 1.1 and 1.4
billion years of age, far less
422
00:23:24,366 --> 00:23:26,968
than the 2.2 billion years
previously estimated.
423
00:23:27,589 --> 00:23:30,231
The findings are important.
Because they helped establish a
424
00:23:30,271 --> 00:23:33,132
new picture of planet Earth's
geological history at a time
425
00:23:33,132 --> 00:23:36,454
when plate tectonic upheavals
saw ancient supercontinents
426
00:23:36,514 --> 00:23:40,236
begin to break up and subduct
while new ones began forming.
427
00:23:40,896 --> 00:23:43,318
The discovery, reported in the
Journal Of The Proceedings Of
428
00:23:43,298 --> 00:23:45,719
The National Academy Of
Sciences, are based on new
429
00:23:45,819 --> 00:23:48,961
geochronology techniques which
are far more accurate at
430
00:23:49,041 --> 00:23:53,035
measuring the age of iron oxide
minerals. The new research is
431
00:23:53,115 --> 00:23:56,336
able to precisely date minerals
from banded iron formations,
432
00:23:56,476 --> 00:23:59,778
which are ancient underwater
layers of iron-rich rock, and
433
00:23:59,798 --> 00:24:02,400
which provide a significant
insight into Earth's deep
434
00:24:02,500 --> 00:24:03,680
geological past.
435
00:24:04,261 --> 00:24:06,842
The study's lead author, Liam
Courtney Davis from Curtin
436
00:24:06,922 --> 00:24:09,964
University and the University Of
Colorado Boulder, says the
437
00:24:10,124 --> 00:24:13,426
energy from this epic geological
activity likely triggered the
438
00:24:13,426 --> 00:24:16,667
production of billions of tons
of iron-rich rock across the
439
00:24:16,707 --> 00:24:17,148
Pilbara.
440
00:24:18,028 --> 00:24:21,310
Western Australia is the world's
leading producer of iron ore.
441
00:24:21,530 --> 00:24:25,694
Which is Australia's largest
export earner at $131 billion a
442
00:24:25,694 --> 00:24:29,518
year. Until now, the exact
timeline of these formations
443
00:24:29,598 --> 00:24:33,002
changing from 30% iron, as they
originally were, to more than
444
00:24:33,142 --> 00:24:35,884
60% iron, as they are today, was
unclear.
445
00:24:36,205 --> 00:24:38,928
And that hindered science's
understanding of the processes
446
00:24:38,968 --> 00:24:42,162
that led to the formation of
these huge reserves. But the
447
00:24:42,182 --> 00:24:45,324
discovery of a link between
these giant iron ore deposits
448
00:24:45,364 --> 00:24:48,625
and changes in supercontinent
cycles enhances science's
449
00:24:48,685 --> 00:24:51,226
understanding of ancient
geological processes and
450
00:24:51,266 --> 00:24:54,067
improves geologists'ability to
predict exactly where they
451
00:24:54,147 --> 00:24:55,788
should be exploring in the
future.
452
00:24:56,428 --> 00:24:59,830
By using an emerging technique
to date iron oxide minerals
453
00:24:59,870 --> 00:25:02,931
through uranium and lead isotope
analysis within the mineral
454
00:25:02,951 --> 00:25:06,113
grains, the authors were able to
directly date all the major
455
00:25:06,193 --> 00:25:09,374
banded iron formation deposits
in the Hammersley Province.
456
00:25:10,002 --> 00:25:13,225
Courtney Davis says the findings
show that these deposits formed
457
00:25:13,225 --> 00:25:16,728
in conjunction with major
tectonic events, events which
458
00:25:16,888 --> 00:25:20,611
changed planet Earth completely,
highlighting the dynamic nature
459
00:25:20,611 --> 00:25:23,514
of the planet's history and the
complexity of iron ore
460
00:25:23,554 --> 00:25:24,494
mineralisation.
461
00:25:24,695 --> 00:25:28,358
So we've been looking into
redefining what is the age of
462
00:25:28,358 --> 00:25:32,161
the mineralisation within the
banded iron formations in the
463
00:25:32,221 --> 00:25:32,641
Pilbara.
464
00:25:33,302 --> 00:25:36,465
The original banded iron
formations that were laid down
465
00:25:36,765 --> 00:25:40,847
across the Hammersley are very
old these are about 2.45 billion
466
00:25:41,168 --> 00:25:45,010
years old but for them to
actually be a mineral deposit or
467
00:25:44,990 --> 00:25:48,592
an iron ore deposit something
has to happen which transforms
468
00:25:48,652 --> 00:25:52,434
these banded iron formations
from about 40 percent iron 30
469
00:25:52,474 --> 00:25:56,576
percent iron to about 60 65
percent iron and this process
470
00:25:57,116 --> 00:26:00,418
was originally believed to have
happened around two billion
471
00:26:00,458 --> 00:26:04,860
years ago based on evidence from
other minerals in the ore which
472
00:26:05,121 --> 00:26:09,083
were not direct indicators of
the age But now at Curtin
473
00:26:09,143 --> 00:26:11,684
University, we've been
developing instruments and
474
00:26:11,704 --> 00:26:15,245
methods that have allowed us to
actually date iron minerals.
475
00:26:15,285 --> 00:26:18,907
So this is iron oxide minerals
like hematite, which are the
476
00:26:18,927 --> 00:26:22,288
minerals that make up the ore
deposits. And through dating of
477
00:26:22,308 --> 00:26:25,990
these minerals in most of the
major deposits within the
478
00:26:26,010 --> 00:26:28,871
region, we found that they're
about a billion years younger
479
00:26:28,931 --> 00:26:30,432
than we previously understood.
480
00:26:30,632 --> 00:26:32,372
Why does that matter? Why is
that important?
481
00:26:32,372 --> 00:26:35,554
So it's important because if we
want to be able to actually
482
00:26:35,654 --> 00:26:39,096
understand... Where mineral
deposits are sitting within the
483
00:26:39,136 --> 00:26:41,637
crust. And this isn't just for
iron ore, this is for all
484
00:26:41,697 --> 00:26:44,599
commodities like gold or
lithium. We need to have a
485
00:26:44,639 --> 00:26:48,821
really good grasp on how these
ore deposits form. So what was
486
00:26:48,821 --> 00:26:53,003
the tectonic setting? What were
the drivers for mineralization?
487
00:26:53,283 --> 00:26:56,805
What were the processes? So once
we can actually define how your
488
00:26:56,825 --> 00:27:00,988
deposit forms, that gives miners
and explorers a blueprint of how
489
00:27:01,208 --> 00:27:04,550
they might be able to better
adapt exploration to search for
490
00:27:04,650 --> 00:27:07,351
more of these. Deposits because
a lot of these deposits are
491
00:27:07,391 --> 00:27:10,532
dwindling in grade, especially
in the Pilbara, and we need to
492
00:27:10,712 --> 00:27:13,253
really be looking for bigger,
better deposits.
493
00:27:13,413 --> 00:27:16,535
When I think of iron, I think of
something condensing out of a
494
00:27:16,575 --> 00:27:20,997
protoplanetary nebula and then
forming the core of a planet
495
00:27:21,297 --> 00:27:25,639
around a nascent star. I then
think of something that's
496
00:27:25,899 --> 00:27:30,000
upwelled from deep within the
Earth in the form of basalt in a
497
00:27:30,041 --> 00:27:32,862
craton or something and
basically sitting in the
498
00:27:32,882 --> 00:27:36,224
lithosphere. There's a third way
iron ore can form, and that is
499
00:27:36,364 --> 00:27:38,946
it's excreted by some
microorganisms in the sea.
500
00:27:39,267 --> 00:27:43,090
Yeah, so in simplest terms, back
in the day, before there was a
501
00:27:43,110 --> 00:27:46,673
lot of oxygen in the atmosphere,
the oceans were very iron-rich,
502
00:27:46,733 --> 00:27:49,575
and a lot of that iron would
have come from hydrothermal
503
00:27:49,655 --> 00:27:53,998
vents in the ocean. So we had a
really iron-rich ocean. Then we
504
00:27:54,059 --> 00:27:57,201
had a period called the Great
Oxidation Event, which is where
505
00:27:57,341 --> 00:28:01,585
bacteria started reacting,
creating oxygen, which reacted
506
00:28:01,645 --> 00:28:03,186
with iron, and that iron then...
507
00:28:03,386 --> 00:28:07,930
Settled on sea floors to create
bands of iron. These would have
508
00:28:07,970 --> 00:28:12,595
been layers of 30 silica-rich
rocks and then layers of more
509
00:28:12,935 --> 00:28:15,638
iron-rich rocks that were
forming. And this is what we see
510
00:28:15,918 --> 00:28:20,002
in Taradini National Park today,
these nice interlayered rocks of
511
00:28:20,042 --> 00:28:25,447
silica to iron-rich material. So
those rocks are the host of what
512
00:28:25,527 --> 00:28:28,630
is being mined, but those rocks
aren't iron-rich enough.
513
00:28:28,962 --> 00:28:32,844
To actually be mined so there's
a later process which happens
514
00:28:32,884 --> 00:28:37,347
which upgrades the banded iron
formations to be a lot more iron
515
00:28:37,427 --> 00:28:40,308
rich and this is a hydro thermal
process which will basically
516
00:28:40,568 --> 00:28:43,910
leak out all that silica and
introduce more iron and
517
00:28:43,970 --> 00:28:47,652
basically concentrate iron
within certain areas of the
518
00:28:48,012 --> 00:28:51,834
pilgrim this is different from
the vast oceans of iron coming
519
00:28:51,894 --> 00:28:55,156
through great magma flows yeah
yeah completely different
520
00:28:55,196 --> 00:29:00,198
because they would be igneous
deposits You do get, in places
521
00:29:00,238 --> 00:29:03,879
like Karuna in Sweden, you do
get magmatic rocks, which are
522
00:29:03,899 --> 00:29:05,940
very iron-rich, which are mines.
523
00:29:05,980 --> 00:29:09,801
Those are called iron oxide
apatite deposits. But these are
524
00:29:10,121 --> 00:29:14,222
sedimentary deposits, which are
then silicified and then
525
00:29:14,342 --> 00:29:16,903
transformed to be more
iron-rich. So yeah, nothing to
526
00:29:16,923 --> 00:29:20,444
do with mantle upwelling or
igneous magmatic activity.
527
00:29:20,664 --> 00:29:24,405
You used a new geochronology
process in order to determine
528
00:29:24,405 --> 00:29:25,345
the age of these rocks.
529
00:29:25,845 --> 00:29:29,406
There's an instrument called a
laser ablation. Inductionally
530
00:29:29,466 --> 00:29:33,647
coupled plasma mass spectrometer
and with this instrument you can
531
00:29:33,707 --> 00:29:38,349
put in small polished pieces of
rock into the sample's chamber.
532
00:29:38,649 --> 00:29:42,690
This will then do a laser beam
down onto the sample material
533
00:29:42,810 --> 00:29:46,991
and in our case that laser beam
is about 50 microns in diameter
534
00:29:47,171 --> 00:29:51,552
that will ablate a little top
section of that mineral so in
535
00:29:51,552 --> 00:29:55,113
our case hematite it will
transport the ablated material
536
00:29:55,193 --> 00:29:58,114
to the mass spectrometer and
that mass spec will then
537
00:29:58,474 --> 00:30:01,115
separate out different elements
and isotopes.
538
00:30:01,235 --> 00:30:03,956
So what we're looking for is to
be able to measure the ratio
539
00:30:04,196 --> 00:30:07,657
between the uranium and the lead
within that tiny little bit of
540
00:30:07,637 --> 00:30:11,057
the mineral grain because
uranium decays to lead. So if we
541
00:30:11,077 --> 00:30:15,199
know the ratio of that, we can
work out what was the exact time
542
00:30:15,259 --> 00:30:17,279
that that mineral grain
crystallized.
543
00:30:17,339 --> 00:30:20,800
So this is a uranium-lead dating
technique which we've now been
544
00:30:20,860 --> 00:30:25,421
able to develop and adapt to use
with iron oxide minerals because
545
00:30:25,461 --> 00:30:29,182
previously, a lot of the time,
people dated Zircon. And other
546
00:30:29,242 --> 00:30:32,523
minerals which are more amenable
to uranium lead. So this is a
547
00:30:32,543 --> 00:30:34,684
new technique which we're
applying here, but then we're
548
00:30:34,704 --> 00:30:37,325
hoping to use in all different
types of environments.
549
00:30:37,525 --> 00:30:40,886
There was a lot of continental
shifting going on. Tectonic
550
00:30:40,946 --> 00:30:43,386
plates were moving and that
aided in this process.
551
00:30:43,686 --> 00:30:46,747
Yeah, so we've been able to
correlate the periods of the
552
00:30:46,767 --> 00:30:51,368
iron ore formation or the
economic mineralization with
553
00:30:51,448 --> 00:30:55,430
different episodes of
continental breakup and coming
554
00:30:55,470 --> 00:30:58,511
together. And we've noticed...
And it's not just with iron ore,
555
00:30:58,511 --> 00:31:00,032
it's with a lot of different
commodities.
556
00:31:00,252 --> 00:31:03,515
In Western Australia, there
seems to be a time period around
557
00:31:03,715 --> 00:31:07,238
1.3 billion years ago when
different parts of Australia
558
00:31:07,318 --> 00:31:11,261
were amalgamating into more like
the continent we see today. And
559
00:31:11,261 --> 00:31:15,185
it's this tectonic force or
drivers that provide the energy
560
00:31:15,625 --> 00:31:19,288
and hydrothermal fluid that we
need to actually transform the
561
00:31:19,308 --> 00:31:22,991
banded iron formations from just
rock into ore.
562
00:31:23,031 --> 00:31:25,973
We talk about banded iron
formations. What are they?
563
00:31:26,354 --> 00:31:26,734
These are...
564
00:31:26,894 --> 00:31:30,396
Sedimentary deposits and they
have a distinctive rhythmic
565
00:31:30,516 --> 00:31:35,178
banding of reddish iron and
paler silica and these elements
566
00:31:35,239 --> 00:31:39,281
were ultimately laid down on the
seafloor seasonally during the
567
00:31:39,281 --> 00:31:43,443
Great Oxidation Event when
oxygen was reacting with iron in
568
00:31:43,463 --> 00:31:46,384
the ocean then allowing it to
settle out as iron oxide
569
00:31:46,404 --> 00:31:50,106
minerals on the ocean floor
these rocks are in the Pilbara
570
00:31:50,146 --> 00:31:55,930
about 2.45 billion years old and
they're an archive between
571
00:31:56,730 --> 00:31:59,812
continents oceans and atmosphere
through time and they're the
572
00:31:59,832 --> 00:32:03,254
rocks which we now mine for iron
once they've been upgraded if
573
00:32:03,354 --> 00:32:06,496
they're younger what does that
mean other than the fact they
574
00:32:06,516 --> 00:32:09,898
were laid down more recently
well if the iron in the rock is
575
00:32:10,479 --> 00:32:14,081
younger than the actual timing
that it was laid down it means
576
00:32:14,101 --> 00:32:17,603
that there was some kind of
event which concentrated iron
577
00:32:17,703 --> 00:32:21,085
within these rocks to an
economic level which made it
578
00:32:21,445 --> 00:32:24,847
viable for the big exploration
companies to go out there and
579
00:32:24,867 --> 00:32:25,147
mine.
580
00:32:25,207 --> 00:32:27,868
And that's where the plate
tectonic movements come in. Yes.
581
00:32:27,868 --> 00:32:28,749
Where does this take us?
582
00:32:29,229 --> 00:32:33,351
For us, something interesting
would be to be able to further
583
00:32:33,431 --> 00:32:36,472
correlate this with banded iron
formations across the world,
584
00:32:36,532 --> 00:32:39,373
because they're not just in
Western Australia. There's huge
585
00:32:39,433 --> 00:32:43,235
deposits of these formations in
South Africa, Brazil, Lake
586
00:32:43,275 --> 00:32:47,036
Superior region in North
America, Ukraine, and China. So
587
00:32:47,036 --> 00:32:50,438
we really want to be able to
understand when all these
588
00:32:50,458 --> 00:32:51,278
deposits were.
589
00:32:51,458 --> 00:32:54,260
Turning into the iron ore that
we see today. And there's lots
590
00:32:54,260 --> 00:32:57,203
of different connections, like
the banded iron formations in
591
00:32:57,183 --> 00:33:00,025
the Pilbara and South Africa are
the same age. They were laid
592
00:33:00,045 --> 00:33:02,707
down at the same time when these
two countries were joined
593
00:33:02,727 --> 00:33:05,509
together as continents. So we
want to be able to work out when
594
00:33:05,710 --> 00:33:08,292
iron ore was forming across the
world, not just within the
595
00:33:08,312 --> 00:33:08,612
Pilbara.
596
00:33:08,792 --> 00:33:11,754
That's Liam Courtney-Davis from
Curtin University and the
597
00:33:11,834 --> 00:33:15,958
University Of Colorado Boulder.
This is Space Time.
598
00:33:31,752 --> 00:33:33,733
And time now to take a brief
look at some of the other
599
00:33:33,793 --> 00:33:36,475
stories making use in science
this week with the Science
600
00:33:36,516 --> 00:33:40,339
Report. A new study shows that
if you're over the age of 40,
601
00:33:40,539 --> 00:33:43,982
taking an hour-long walk every
day could add years to your
602
00:33:44,062 --> 00:33:44,482
life.
603
00:33:45,122 --> 00:33:47,885
The findings reported in the
British journal Sports Medicine
604
00:33:48,045 --> 00:33:51,287
looked at physical activity and
life expectancy, showing that if
605
00:33:51,387 --> 00:33:54,690
people over the age of 40 were
as physically active as the top
606
00:33:54,750 --> 00:33:57,873
25% of the population, they
could expect to live an extra
607
00:33:58,013 --> 00:34:01,971
five years on average. Or to put
it more simply, for every one
608
00:34:01,991 --> 00:34:05,131
hour long walk you take, it adds
an extra three hours to your
609
00:34:05,191 --> 00:34:05,572
life.
610
00:34:06,192 --> 00:34:09,533
The study also found that the
impact of exercise was greatest
611
00:34:09,533 --> 00:34:12,834
for the least active people, who
could add an extra six hours to
612
00:34:12,854 --> 00:34:16,355
their lives simply by taking
that one hour walk. The authors
613
00:34:16,435 --> 00:34:19,635
say the study proves that the
costs of physical inactivity are
614
00:34:19,755 --> 00:34:21,836
far greater than previously
thought.
615
00:34:23,376 --> 00:34:26,717
A new study has shown that
global plastic waste will double
616
00:34:26,757 --> 00:34:29,959
by the middle of the century if
humans stick. To business as
617
00:34:30,119 --> 00:34:34,321
usual. However, researchers also
found that a mix of policies
618
00:34:34,501 --> 00:34:38,944
could slash plastic waste by up
to 90%. The study reported in
619
00:34:38,924 --> 00:34:42,306
the journal Science also found
that greenhouse gas emissions
620
00:34:42,346 --> 00:34:45,268
from plastic production and
waste management are set to grow
621
00:34:45,348 --> 00:34:48,270
by at least 37% over the same
period.
622
00:34:48,951 --> 00:34:52,553
However, an intelligent mix of
policies could slash plastic
623
00:34:52,633 --> 00:34:56,427
waste by up to 90%. To reach
their conclusions, the authors
624
00:34:56,487 --> 00:34:59,288
simulated eight interventions
currently being considered by
625
00:34:59,308 --> 00:35:02,209
the United Nations Plastic
Pollutions Treaty, finding that
626
00:35:02,309 --> 00:35:05,570
implementing just four could
reduce mismanaged plastic waste
627
00:35:05,570 --> 00:35:09,372
by roughly 91% and
plastic-related emissions by a
628
00:35:09,412 --> 00:35:09,912
third.
629
00:35:11,553 --> 00:35:14,774
A new study has found that
switching to a vegan diet could
630
00:35:14,814 --> 00:35:19,216
lower your food costs by 19%. On
the other hand, switching to a
631
00:35:19,256 --> 00:35:22,718
Mediterranean diet is unlikely
to have any impact on the cost
632
00:35:22,718 --> 00:35:25,894
of your groceries. The study
reported in the Journal Of The
633
00:35:25,894 --> 00:35:29,435
American Medical Association
compared 30 people who started a
634
00:35:29,455 --> 00:35:32,776
vegan diet and 30 people who
started a Mediterranean diet.
635
00:35:33,477 --> 00:35:36,577
And they estimated their food
costs based on several three-day
636
00:35:36,677 --> 00:35:39,398
records of what the participants
ate during the study.
637
00:35:40,158 --> 00:35:42,739
Researchers found the lowered
cost of the vegan diet were
638
00:35:42,759 --> 00:35:46,420
mainly associated with savings
on meat and added fats. And
639
00:35:46,460 --> 00:35:49,701
these savings clearly outweighed
the increased spending on
640
00:35:49,741 --> 00:35:52,522
vegetables, grains, fruits and
meat alternatives.
641
00:35:54,330 --> 00:35:57,852
The 2024 Ben Spoon Award, the
glittering highlight of the
642
00:35:57,852 --> 00:36:00,774
Australian Skeptical Calendar,
has been awarded to the Cancer
643
00:36:00,815 --> 00:36:03,416
Council Of Western Australia for
its endorsement of the
644
00:36:03,436 --> 00:36:06,739
pseudo-medical and unscientific
practices of Reiki and
645
00:36:06,779 --> 00:36:07,659
reflexology.
646
00:36:08,340 --> 00:36:10,881
The award's presented annually
at the Australian Skeptic
647
00:36:10,962 --> 00:36:14,184
Skepticon Conference, which this
year was held in Sydney. It's
648
00:36:14,224 --> 00:36:17,206
presented to the perpetrator of
the most preposterous piece of
649
00:36:17,266 --> 00:36:20,888
paranormal or pseudo-scientific
piffle. The Western Australian
650
00:36:20,948 --> 00:36:23,010
Cancer Council is a registered
charity.
651
00:36:23,702 --> 00:36:26,503
It has the stated purpose of
working with the community to
652
00:36:26,543 --> 00:36:29,524
reduce the incidence and the
impact of cancer based on the
653
00:36:29,544 --> 00:36:32,545
most solid foundations of
evidence available.
654
00:36:33,265 --> 00:36:36,146
However, the Western Australian
Cancer Council says that
655
00:36:36,186 --> 00:36:39,667
complementary therapies such as
massage, beauty treatments and
656
00:36:39,747 --> 00:36:42,847
Reiki, used in conjunction with
conventional medical treatments,
657
00:36:43,028 --> 00:36:46,208
are increasingly considered an
important part of supportive
658
00:36:46,268 --> 00:36:49,529
care, which helps people address
a wide range of challenges
659
00:36:49,649 --> 00:36:51,330
beyond medical treatment or
cancer.
660
00:36:52,006 --> 00:36:54,707
The inclusion of Reiki, which is
a system in which the
661
00:36:54,707 --> 00:36:57,628
practitioner passes their hands
through the air over a patient,
662
00:36:57,808 --> 00:37:00,749
often without touching them,
supposedly helps balance their
663
00:37:00,809 --> 00:37:01,549
energy flows.
664
00:37:02,089 --> 00:37:04,970
And that's especially concerning
for an organisation like the
665
00:37:04,990 --> 00:37:07,591
Cancer Council, which is
designed to help people during
666
00:37:07,611 --> 00:37:10,672
and after their diagnosis for
cancer and subsequent
667
00:37:10,832 --> 00:37:12,053
evidence-based treatments.
668
00:37:12,813 --> 00:37:16,134
Tim Mendham, Executive Officer
for Australian Skeptics, says
669
00:37:16,174 --> 00:37:18,776
for an organization like the
Western Australian Cancer
670
00:37:18,796 --> 00:37:22,099
Council to endorse and add its
imprimatur to pseudoscientific
671
00:37:22,159 --> 00:37:25,202
practices in the name of
well-being is disappointing,
672
00:37:25,402 --> 00:37:27,964
especially when some elements of
the industry, such as the
673
00:37:27,984 --> 00:37:30,746
International Center For Reiki
Training, wrongly claim that
674
00:37:30,866 --> 00:37:32,488
Reiki can actually cure cancer.
675
00:37:33,268 --> 00:37:36,711
Mendham says opening the door to
pseudo and unscientific medical
676
00:37:36,771 --> 00:37:39,493
treatments in the name of
well-being is simply not
677
00:37:39,533 --> 00:37:43,337
acceptable. Reiki and
reflexology were both recently
678
00:37:43,417 --> 00:37:46,499
included in the list of
therapies no longer covered by
679
00:37:46,519 --> 00:37:47,539
the NDIS.
680
00:37:48,219 --> 00:37:51,461
Runners-up for this year's Bent
Spoon included Ellie McPherson
681
00:37:51,541 --> 00:37:53,902
for her own treatment for
cancer, and especially her
682
00:37:53,942 --> 00:37:56,863
medical consultant, Simone
Lubeshere, the latter claiming a
683
00:37:56,903 --> 00:37:59,324
string of spurious medical
qualifications.
684
00:37:59,884 --> 00:38:03,386
A dishonourable mention went to
Channel 7 News for endorsing
685
00:38:03,426 --> 00:38:07,307
astrology, weather control, and
unsubstantiated autism
686
00:38:07,367 --> 00:38:10,529
treatments. The Western
Australian Cancer Council now
687
00:38:10,649 --> 00:38:13,150
joins an illustrious rogues
gallery of...
688
00:38:13,290 --> 00:38:16,231
Past Bent Spoon winners,
including Walkley Award-winning
689
00:38:16,291 --> 00:38:19,373
journalist and UFO proponent
Ross Coulthard, former celebrity
690
00:38:19,453 --> 00:38:22,114
chef Pete Evans, who's actually
won the award twice, the
691
00:38:22,214 --> 00:38:25,876
Australian Vaccination Network,
which opposes vaccinations, a
692
00:38:25,896 --> 00:38:30,398
psychic dentist, and both the
broadcasting networks ABC and
693
00:38:30,679 --> 00:38:35,573
SBS. My, how the once great have
fallen. This is Space Time.
694
00:38:51,382 --> 00:38:55,184
That's the show for now. Space
Time is available every Monday,
695
00:38:55,304 --> 00:38:58,306
Wednesday and Friday through
Apple Podcasts, ITunes,
696
00:38:58,626 --> 00:39:02,992
Stitcher, Google Podcasts,
Talker Casts, Spotify. Acast,
697
00:39:03,233 --> 00:39:07,335
Amazon Music, Bytes.Com,
SoundCloud, YouTube, your
698
00:39:07,395 --> 00:39:10,577
favorite podcast download
provider, and from Spacetime
699
00:39:10,597 --> 00:39:12,058
with StuartGarry.Com.
700
00:39:12,818 --> 00:39:15,360
Spacetime's also broadcast
through the National Science
701
00:39:15,380 --> 00:39:19,342
Foundation on Science Zone Radio
and on both IHeart Radio and
702
00:39:19,462 --> 00:39:23,244
TuneIn Radio. And you can help
to support our show by visiting
703
00:39:23,244 --> 00:39:26,406
the Spacetime store for a range
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704
00:39:26,446 --> 00:39:29,348
goodies. Or by becoming a
Spacetime patron.
705
00:39:29,588 --> 00:39:32,630
Which gives you access to triple
episode commercial free versions
706
00:39:32,630 --> 00:39:35,591
of the show, as well as lots of
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doesn't go to air, access to our
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708
00:39:39,193 --> 00:39:43,415
other rewards. Just go to
spacetimewithstuartgary.com for
709
00:39:43,455 --> 00:39:46,877
full details. You've been
listening to Spacetime with
710
00:39:46,937 --> 00:39:47,578
Stuart Gary.
711
00:39:48,318 --> 00:39:51,039
This has been another quality
podcast production from
712
00:39:51,179 --> 00:39:52,040
Bytes.Com.
00:00:00,492 --> 00:00:05,375
This is Space Time, Series 27,
Episode 142, for broadcast on
2
00:00:05,395 --> 00:00:10,599
the 25th of November, 2024.
Coming up on Space Time, how the
3
00:00:10,659 --> 00:00:15,422
red planet Mars got its moons,
our full report on Starship Test
4
00:00:15,442 --> 00:00:19,985
Flight 6, and a billion year
shift in the formation of planet
5
00:00:20,045 --> 00:00:24,308
Earth's largest ore deposits.
All that and more coming up on
6
00:00:24,388 --> 00:00:25,269
Space Time.
7
00:00:26,530 --> 00:00:29,592
Welcome to Space Time with
Stuart Gary.
8
00:00:45,682 --> 00:00:49,403
A new study suggests that Mars
got its two moons, Phobos and
9
00:00:49,463 --> 00:00:53,185
Deimos, after a passing asteroid
was ripped apart by the red
10
00:00:53,265 --> 00:00:57,126
planet's gravity. The findings
reported in the journal Icarus
11
00:00:57,327 --> 00:01:01,825
are based on new supercomputer
simulations by NASA. Besides the
12
00:01:01,885 --> 00:01:05,187
Earth's Moon, Phobos and Deimos
are the only moons in our solar
13
00:01:05,227 --> 00:01:07,529
system that orbit a terrestrial
planet.
14
00:01:08,150 --> 00:01:10,932
Previous hypotheses have
suggested that the two tiny
15
00:01:11,012 --> 00:01:14,035
moons were either captured
main-built asteroids, or the
16
00:01:14,095 --> 00:01:17,117
result of a major asteroid
impact on the Martian surface,
17
00:01:17,318 --> 00:01:20,220
possibly on the planet's
northern hemisphere lowlands.
18
00:01:20,841 --> 00:01:24,323
That latter explanation better
accounts for the paths the moons
19
00:01:24,383 --> 00:01:28,067
travel today, in these circular
orbits that closely align with
20
00:01:28,067 --> 00:01:29,067
the Martian equator.
21
00:01:29,808 --> 00:01:33,230
The problem is a giant impact
usually ejects material into a
22
00:01:33,330 --> 00:01:36,532
disk that mostly stays close to
the planet, and the Martian
23
00:01:36,592 --> 00:01:39,914
Moons, especially Deimos, are
orbiting quite a bit further out
24
00:01:39,954 --> 00:01:42,855
from the planet, and so probably
formed at their current
25
00:01:42,915 --> 00:01:43,436
distance.
26
00:01:44,036 --> 00:01:47,158
The new study, using a series of
supercomputer simulations,
27
00:01:47,378 --> 00:01:51,260
suggests another option, the
destruction of an asteroid that
28
00:01:51,360 --> 00:01:54,662
ventured too close to Mars,
pushing through its Roche limit,
29
00:01:54,882 --> 00:01:57,944
where gravitational tidal
disruptions tore the asteroid
30
00:01:57,984 --> 00:02:01,898
apart. The new modelling shows
the resulting rocky fragments
31
00:02:01,918 --> 00:02:04,639
from the asteroid's destruction
would have been strewn into a
32
00:02:04,679 --> 00:02:06,320
variety of orbits around Mars.
33
00:02:07,201 --> 00:02:10,003
More than half those fragments
would have escaped the Mars
34
00:02:10,063 --> 00:02:12,965
system completely, but others
would have stayed in orbit.
35
00:02:13,685 --> 00:02:16,967
Tugged by the gravity of both
Mars and the Sun, some of these
36
00:02:17,007 --> 00:02:19,409
remaining pieces would have
collided with one another, and
37
00:02:19,529 --> 00:02:22,711
every encounter would have
further ground them down,
38
00:02:22,851 --> 00:02:24,832
turning them into even more
debris.
39
00:02:25,544 --> 00:02:28,585
Many collisions later, smaller
chunks from the former asteroid
40
00:02:28,665 --> 00:02:31,526
would have settled into a debris
disk circling the planet like a
41
00:02:31,566 --> 00:02:35,547
ring. And over time, some of
this material would eventually
42
00:02:35,567 --> 00:02:39,268
have coalesced, accreting to
ultimately form Phobos and
43
00:02:39,328 --> 00:02:39,868
Deimos.
44
00:02:40,568 --> 00:02:43,709
To assess whether this was a
realistic chain of events, the
45
00:02:43,709 --> 00:02:46,290
authors explored hundreds of
different close-encounter
46
00:02:46,350 --> 00:02:50,151
simulations, varying the
asteroid's size, spin, speed and
47
00:02:50,271 --> 00:02:53,804
distance at its closest approach
to the red planet. Now in many
48
00:02:53,804 --> 00:02:56,885
of these scenarios, enough
asteroid fragments survived and
49
00:02:56,905 --> 00:03:00,507
collided in orbit to serve as
the raw material to form the two
50
00:03:00,587 --> 00:03:01,187
moons.
51
00:03:01,727 --> 00:03:04,789
The study's lead author, Jacob
Kagaras from NASA's Ames
52
00:03:04,849 --> 00:03:07,890
Research Center in California's
Silicon Valley, says this new
53
00:03:07,950 --> 00:03:10,031
model makes different
predictions about the two
54
00:03:10,091 --> 00:03:13,412
moons'properties, and these can
be tested against standard ideas
55
00:03:13,432 --> 00:03:17,354
for this key event in Martian
history. The new hypothesis also
56
00:03:17,434 --> 00:03:19,915
allows for a more efficient
distribution of Moon-making
57
00:03:19,975 --> 00:03:22,736
material to the outer regions of
the debris disk.
58
00:03:23,360 --> 00:03:26,423
And that means a much smaller
parent asteroid could still
59
00:03:26,463 --> 00:03:29,666
deliver enough material to send
the Moon's building blocks to
60
00:03:29,646 --> 00:03:33,089
the right place. Testing
different ideas about the
61
00:03:33,109 --> 00:03:36,493
formation of the two Martian
Moons is the primary goal of the
62
00:03:36,533 --> 00:03:40,296
upcoming Martian Moons
Exploration or MMX sample return
63
00:03:40,356 --> 00:03:43,439
mission which will be led by
JAXA, the Japanese Aerospace
64
00:03:43,479 --> 00:03:44,620
Exploration Agency.
65
00:03:45,301 --> 00:03:48,804
The spacecraft will survey both
Deimos and Phobos before
66
00:03:48,884 --> 00:03:51,906
eventually collecting samples
from the surface of Phobos to
67
00:03:51,986 --> 00:03:55,588
bring back to Earth for study. A
NASA instrument aboard the
68
00:03:55,628 --> 00:03:59,190
spacecraft called MIGAIN, short
for Mars Moon Exploration with
69
00:03:59,230 --> 00:04:02,392
Gamma Rays and Neutrons, will
identify the chemical elements
70
00:04:02,452 --> 00:04:05,733
Phobos is made of and help
select sites for the sample
71
00:04:05,793 --> 00:04:06,334
collection.
72
00:04:06,974 --> 00:04:09,656
And some of these samples will
be collected by a pneumatic
73
00:04:09,756 --> 00:04:13,157
sampler also provided by NASA as
a technology demonstration
74
00:04:13,218 --> 00:04:16,719
contribution to the mission.
Understanding what the Martian
75
00:04:16,759 --> 00:04:19,941
Moons are made of, is one clue
which could distinguish between
76
00:04:19,961 --> 00:04:23,483
the moons having an asteroid
origin or a planet plus impactor
77
00:04:23,583 --> 00:04:24,003
origin.
78
00:04:24,864 --> 00:04:29,646
This is Space Time. Still to
come, SpaceX undertakes a
79
00:04:29,666 --> 00:04:33,208
successful sixth test flight of
its Starship Mega Rocket, and a
80
00:04:33,268 --> 00:04:37,190
new study shows a billion-year
shift in the formation of planet
81
00:04:37,230 --> 00:04:40,591
Earth's largest ore deposits.
All that and more still to come
82
00:04:40,891 --> 00:04:41,872
on Space Time.
83
00:04:58,016 --> 00:05:01,238
SpaceX has undertaken a
successful sixth test flight of
84
00:05:01,238 --> 00:05:04,360
its Starship Mega Rocket, with
United States President-elect
85
00:05:04,400 --> 00:05:08,182
Donald Trump joining space
ex-boss Elon Musk to witness the
86
00:05:08,222 --> 00:05:10,103
spectacular launch firsthand.
87
00:05:10,363 --> 00:05:11,604
Flight director is go for
launch.
88
00:05:13,545 --> 00:05:17,307
T-minus 20 seconds until liftoff
of Starship Flight 6.
89
00:05:17,987 --> 00:05:25,692
9, 6, 7, 6, 5, 4, 3, 2, 1.
90
00:05:32,159 --> 00:05:32,759
We got puts in.
91
00:05:34,240 --> 00:05:35,580
Vehicle with pitch and gale
range.
92
00:05:35,580 --> 00:05:37,441
2-star Raptor, telemetry
nominal.
93
00:05:37,602 --> 00:05:39,943
2-star and 5th, avionics, power
and telemetry nominal.
94
00:05:40,323 --> 00:05:44,425
All right, we are just a little
over a minute. We're about six
95
00:05:44,505 --> 00:05:47,467
miles away, so all the sound's
still hitting us here. Hearing
96
00:05:47,487 --> 00:05:50,829
good call-outs at power,
telemetry nominal. That's flying
97
00:05:50,849 --> 00:05:55,111
straight and true. We do see all
33 Raptor engines lit up on
98
00:05:55,191 --> 00:05:56,292
telemetry screens.
99
00:05:56,668 --> 00:05:59,430
At this point, we've passed
through that point of maximum
100
00:05:59,490 --> 00:06:03,433
aerodynamic pressure, that max
Q. Now coming up in just a
101
00:06:03,633 --> 00:06:07,435
little over a minute from now is
going to be hot staging. So
102
00:06:07,515 --> 00:06:11,438
we're going to see the six
engines on the ship ignite while
103
00:06:11,458 --> 00:06:14,340
still attached to the booster.
Just before that, we'll see all
104
00:06:14,440 --> 00:06:17,102
but three center engines on the
booster shut down.
105
00:06:17,322 --> 00:06:20,644
In what we call MECO, it's most
engines cut off instead of main
106
00:06:20,704 --> 00:06:23,706
engine. A lot of our flight
controllers looking at all the
107
00:06:23,766 --> 00:06:27,028
systems around the tower. Again,
we have to send... A manual
108
00:06:27,088 --> 00:06:32,031
command. We heard the tower is
go for catch. We've heard the
109
00:06:32,091 --> 00:06:33,971
return flag is set for true.
110
00:06:34,452 --> 00:06:36,392
Dependent from setup, stage
declaration.
111
00:06:36,613 --> 00:06:39,074
All right. Hot staging
confirmed. Checked out a sick
112
00:06:39,234 --> 00:06:42,515
lit on the ship. Booster boost
back going. We heard that we are
113
00:06:42,595 --> 00:06:45,537
go for catch. Kate, Jesse, take
good reviews. Hopefully I got a
114
00:06:45,557 --> 00:06:47,277
booster coming home real soon.
115
00:06:47,497 --> 00:06:50,959
Right now it is performing the
boost back burn. Good news there
116
00:06:51,019 --> 00:06:53,060
telling us that the pressures
are.
117
00:06:53,220 --> 00:06:57,141
Inside the ship are good that is
the second stage or the upper
118
00:06:57,201 --> 00:07:00,283
portion of the vehicle yeah
booster is currently a super
119
00:07:00,303 --> 00:07:03,584
heavy is currently in its boost
back burn this boost back burn
120
00:07:05,324 --> 00:07:08,505
this boost back burn lasts just
a little bit over a minute
121
00:07:08,585 --> 00:07:12,007
however a loss of communication
with a launch tower computer at
122
00:07:11,987 --> 00:07:15,088
the bokeh chica Starbase in
Texas meant they were prevented
123
00:07:15,128 --> 00:07:18,250
from seeing a repeated the
previous test's spectacular
124
00:07:18,310 --> 00:07:21,272
super-heavy booster returning to
the launch pad and being
125
00:07:21,332 --> 00:07:23,915
captured by the launch tower's
chopstick arms.
126
00:07:24,575 --> 00:07:27,618
So instead, the first stage was
instructed to undertake a
127
00:07:27,658 --> 00:07:30,620
vertical landing at sea
splashing down in the Gulf Of
128
00:07:30,660 --> 00:07:34,043
Mexico. But all other aspects of
the flight appeared to go
129
00:07:34,143 --> 00:07:37,606
according to plan, with a hot
staging separation of the upper
130
00:07:37,686 --> 00:07:40,808
Starship orbital section from
the booster section performing
131
00:07:40,889 --> 00:07:41,369
nominally.
132
00:07:42,029 --> 00:07:45,512
The booster then undertook its
boost-back re-entry burn Using
133
00:07:45,532 --> 00:07:47,993
its underbelly heat shield to
belly flop through the
134
00:07:48,053 --> 00:07:51,095
atmosphere to burn off speed
during the re-entry and then
135
00:07:51,255 --> 00:07:54,216
flipping from the horizontal
back to the vertical at the last
136
00:07:54,296 --> 00:07:57,757
minute for a perfectly executed
landing burn and touchdown on
137
00:07:57,757 --> 00:07:58,838
the sea surface.
138
00:07:58,978 --> 00:08:00,278
Booster off or divert.
139
00:08:00,399 --> 00:08:03,300
The hot stage has been
jettisoned.
140
00:08:03,660 --> 00:08:05,321
Yes, visual confirmation of
that.
141
00:08:05,421 --> 00:08:07,241
Starhip is following a nominal
trajectory.
142
00:08:07,442 --> 00:08:10,503
The next step for booster is
going into that landing burn.
143
00:08:10,543 --> 00:08:14,164
Again, it'll light up 13 of
those engines. And then pared
144
00:08:14,184 --> 00:08:17,206
down to three engines right
before booster catch.
145
00:08:17,266 --> 00:08:19,507
All right. Now, just real quick,
we did hear the call out,
146
00:08:19,667 --> 00:08:22,528
booster offshore divert.
Unfortunately, that means that
147
00:08:22,548 --> 00:08:26,470
we are no go for the catch. Both
the tower and the vehicle, as
148
00:08:26,550 --> 00:08:30,071
well as the operators on
console, have been actively
149
00:08:30,411 --> 00:08:34,633
evaluating the commit criteria
for that return to the launch
150
00:08:34,693 --> 00:08:38,915
tower. And unfortunately, we did
not have a pass on those commit
151
00:08:38,955 --> 00:08:41,536
criteria. So we are no go for
tower catch.
152
00:08:41,736 --> 00:08:44,238
There's a lot of things that
need to go well in order to line
153
00:08:44,258 --> 00:08:47,419
that up. Unfortunately, today we
won't forego booster catch
154
00:08:47,519 --> 00:08:50,241
today. We have an additional
objective today to do an
155
00:08:50,401 --> 00:08:54,344
in-space relight of a Raptor
engine, which again will help us
156
00:08:54,624 --> 00:08:59,246
set us up for being able to do
deorbit burns, which is
157
00:08:59,287 --> 00:09:00,787
important for orbital flights.
158
00:09:00,827 --> 00:09:03,869
Yeah, once again, we are
attempting an offshore landing
159
00:09:04,029 --> 00:09:08,672
of the super heavy booster off
the Gulf Coast of Texas. Those
160
00:09:08,712 --> 00:09:11,513
grid fins, there are four
hypersonic grid fins. Oh, we can
161
00:09:11,553 --> 00:09:15,235
see that the landing run has
begun. This is a heavy booster.
162
00:09:15,455 --> 00:09:18,837
Same padding, 13 engines will
light. Calm down to three, just
163
00:09:18,877 --> 00:09:21,978
as we expected. Splash down.
Super heavy.
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00:09:22,358 --> 00:09:26,020
So we'd like to confirm a water
landing once again for the super
165
00:09:26,100 --> 00:09:26,980
heavy booster.
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00:09:27,141 --> 00:09:29,942
Meanwhile, the Starship Upper
Stage continued to climb to
167
00:09:30,022 --> 00:09:32,863
orbit, cruising halfway around
the planet before re-entering
168
00:09:32,863 --> 00:09:36,025
the atmosphere above the Indian
Ocean off the Western Australian
169
00:09:36,105 --> 00:09:39,574
coastline. The test included
reigniting one of Starship's
170
00:09:39,654 --> 00:09:42,274
Raptor engines for the first
time in space.
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00:09:42,474 --> 00:09:45,155
It's going to attempt to do an
in-space burn. We're going to
172
00:09:45,195 --> 00:09:47,996
light one of those Raptor
engines, the sea-level ones in
173
00:09:47,976 --> 00:09:50,437
the middle, just to help
demonstrate that we can relight
174
00:09:50,597 --> 00:09:53,698
in that microgravity
environment. Really critical for
175
00:09:53,918 --> 00:09:57,218
de-orbit burns. We start to do
some orbital missions in the
176
00:09:57,218 --> 00:10:00,319
not-too-distant future. And then
following that, we'll see a ship
177
00:10:00,419 --> 00:10:02,560
entry, maybe a splashdown.
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00:10:02,880 --> 00:10:05,721
As you guys said, we're really
going to be pushing ship on this
179
00:10:05,861 --> 00:10:08,001
one. We're... Pretty much
intentionally putting it in
180
00:10:08,021 --> 00:10:11,342
places where we expect it might
not do so great. And all that's
181
00:10:11,342 --> 00:10:14,423
to try and help us learn, see if
we're a little too conservative.
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00:10:14,543 --> 00:10:17,144
And then maybe that opens up
more capability for when we
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00:10:17,164 --> 00:10:17,884
start catching them.
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00:10:18,064 --> 00:10:23,206
The next milestone is Starship
Terminal Guidance, referring to
185
00:10:23,226 --> 00:10:28,987
the upper stage. At about 8
minutes, 35 seconds or so, we
186
00:10:29,327 --> 00:10:33,069
have Ship Engine Cutoff, which
will be the cutoff of the Raptor
187
00:10:33,169 --> 00:10:33,589
engines.
188
00:10:34,885 --> 00:10:38,007
And there we just heard a call
out for SECO Ship Engine Cutoff.
189
00:10:38,107 --> 00:10:39,688
Everything continuing to look
awesome.
190
00:10:40,229 --> 00:10:43,211
Fts in place. Nominal orbit
insertion.
191
00:10:43,231 --> 00:10:46,593
There's that call out. We were
waiting for confirmation of good
192
00:10:46,813 --> 00:10:48,775
orbital insertion for ship
today.
193
00:10:49,095 --> 00:10:51,997
Ship nominal orbit. So it's on
its way around the planet.
194
00:10:52,117 --> 00:10:54,419
And trialing new heat shield
materials.
195
00:10:54,599 --> 00:10:57,701
As a reminder, one of the main
goals of today's flight test is
196
00:10:57,841 --> 00:11:01,704
for the ship to make it through
the extreme heat of reentry and
197
00:11:01,724 --> 00:11:05,326
to do so in a controlled manner.
Now, reentry is typically a
198
00:11:05,366 --> 00:11:08,908
portion of flight where we don't
have communication capability
199
00:11:09,028 --> 00:11:13,110
with the spacecraft because it's
reentering at or around orbital
200
00:11:13,150 --> 00:11:18,093
velocity, which is roughly eight
kilometers per second or about
201
00:11:18,233 --> 00:11:19,874
five miles per second.
202
00:11:20,354 --> 00:11:24,056
Now, at those speeds, yep,
pretty fast. The spacecraft is
203
00:11:24,116 --> 00:11:27,738
moving through the atmosphere
rather quickly, and that results
204
00:11:27,858 --> 00:11:32,021
in friction. And this creates a
plasma field around the vehicle.
205
00:11:32,281 --> 00:11:36,024
That. Blanket of plasma distorts
communication frequency, so it's
206
00:11:36,064 --> 00:11:39,808
not uncommon to experience brief
blackouts in communication.
207
00:11:40,068 --> 00:11:42,570
Other thermal protection
experiments saw some areas
208
00:11:42,630 --> 00:11:45,673
stripped of their heat tiles to
see whether catch mechanisms
209
00:11:45,713 --> 00:11:47,915
could be positioned there on
future flights.
210
00:11:48,255 --> 00:11:52,619
The receding tile line where we
have removed a number of heat
211
00:11:52,659 --> 00:11:56,603
shield tiles in order to test
out and push the envelope on the
212
00:11:56,703 --> 00:11:59,025
ship and demonstrate what its
capabilities are.
213
00:11:59,165 --> 00:12:02,527
We are really pushing the ship
today. The heat shield is not in
214
00:12:02,527 --> 00:12:06,790
the same configuration as it was
last flight, where we had a team
215
00:12:06,810 --> 00:12:11,072
of ship techs do just an
otherworldly task, replacing the
216
00:12:11,092 --> 00:12:15,615
entire heat shield, thousands of
tiles, installing a backup of
217
00:12:15,655 --> 00:12:19,417
LATV, and that pretty much set
us up to do a pinpoint landing
218
00:12:19,437 --> 00:12:20,258
on Flight 5.
219
00:12:20,378 --> 00:12:23,600
We did not do that with this
one. We have some backup in
220
00:12:23,640 --> 00:12:26,902
those really sensitive areas
around the flat. But this is an
221
00:12:26,942 --> 00:12:30,044
older generation heat shield.
And knowing we weren't going to
222
00:12:30,024 --> 00:12:33,726
do that, we even went and
removed some extra tiles. There
223
00:12:33,746 --> 00:12:36,468
are some missing tiles on the
nose cone where we're testing
224
00:12:36,488 --> 00:12:37,209
some backups.
225
00:12:37,489 --> 00:12:40,972
There are some steel covered
tiles in a couple of different
226
00:12:41,032 --> 00:12:43,914
spots. And there's also a whole
lot more steel of the ship
227
00:12:44,054 --> 00:12:47,080
showing. A couple hundred tiles
trimmed off the sides, and that
228
00:12:47,080 --> 00:12:49,998
's where we might have catch
fittings in the future. But
229
00:12:50,198 --> 00:12:53,300
color is starting to come in.
Looks like things are going to
230
00:12:53,300 --> 00:12:54,521
start heating up, Kate and
Jesse.
231
00:12:54,721 --> 00:12:59,483
Yeah, fun fact, Dan, we actually
removed 2,100 heat shield tiles
232
00:12:59,843 --> 00:13:03,865
from Starship in order to
basically present that necessary
233
00:13:04,145 --> 00:13:08,647
receding line. We want to test
the vehicle beyond what we think
234
00:13:08,747 --> 00:13:12,268
it is capable of carrying based
on our simulations and
235
00:13:12,288 --> 00:13:13,049
calculations.
236
00:13:13,309 --> 00:13:16,450
So once again, don't be
surprised if we see some
237
00:13:16,530 --> 00:13:20,291
wackadoodle stuff happen here.
We won't be. There are a number
238
00:13:20,291 --> 00:13:24,313
of things that we are testing
out intentionally to see. What
239
00:13:24,353 --> 00:13:25,374
the ship can take.
240
00:13:25,934 --> 00:13:28,635
Yeah, exactly. And knowing what
those limits are will really
241
00:13:28,775 --> 00:13:32,397
help us design the vehicle of
the future. Essentially,
242
00:13:32,437 --> 00:13:35,038
removing those tiles helps us
remove a lot of weight from the
243
00:13:35,058 --> 00:13:37,279
vehicle, a lot of things that
might potentially need
244
00:13:37,359 --> 00:13:38,600
refurbishment in the future.
245
00:13:38,720 --> 00:13:43,202
And the goal is to come up with
a heat shield pattern or design
246
00:13:43,322 --> 00:13:46,664
that we don't have to refurbish.
We can just continue to use it
247
00:13:46,724 --> 00:13:50,045
over and over again. And that's
why we're... Changing some of
248
00:13:50,045 --> 00:13:53,407
those tiles and moving stuff
around, removing a lot of those
249
00:13:53,427 --> 00:13:55,449
tiles, as Kate has been
mentioning.
250
00:13:55,809 --> 00:13:58,751
Exactly. And, you know, looking
forward to the Starship
251
00:13:58,831 --> 00:14:00,952
capability of the future, we
want to be able to catch
252
00:14:01,052 --> 00:14:04,034
Starship like we do with
boosters. And so the next
253
00:14:04,054 --> 00:14:07,396
flight, we want to better
understand where we can install
254
00:14:07,516 --> 00:14:10,577
catch hardware, not necessarily
to actually do the catch, but to
255
00:14:10,657 --> 00:14:13,139
see how that hardware holds up
in those spots.
256
00:14:13,259 --> 00:14:16,401
And today's flight will help
inform, you know, does the...
257
00:14:16,885 --> 00:14:20,048
Stainless steel hold up like we
think it may based on
258
00:14:20,068 --> 00:14:22,590
experiments that we conducted on
Flight 5.
259
00:14:23,050 --> 00:14:26,393
And Starship was also programmed
to test a new, more aggressive
260
00:14:26,433 --> 00:14:29,596
descent strategy before flipping
vertically for the landing.
261
00:14:29,836 --> 00:14:33,039
Starship is at 85 kilometres.
Flaps now have control of the
262
00:14:33,039 --> 00:14:33,359
vehicle.
263
00:14:33,619 --> 00:14:37,403
The ship is beginning to
re-enter the Earth's atmosphere.
264
00:14:37,683 --> 00:14:40,765
Starship is approaching the peak
heating phase of entry. We've
265
00:14:40,805 --> 00:14:44,927
got kind of the next-gen ship
lined up for Flight 7. It's got
266
00:14:45,268 --> 00:14:47,749
all of those heat shield
upgrades and everything. And one
267
00:14:47,749 --> 00:14:49,890
of the things that we're going
to be doing that's most
268
00:14:49,950 --> 00:14:52,311
interesting and one of the
reasons we wanted daylight is
269
00:14:52,351 --> 00:14:55,673
we're going to be flying pretty
aggressively as ship comes in.
270
00:14:55,893 --> 00:14:58,395
We're going to be kind of nose
down. We've done it in wind
271
00:14:58,435 --> 00:14:58,775
tunnels.
272
00:14:58,815 --> 00:15:01,857
We've done it in simulations.
You might see the flaps really
273
00:15:02,157 --> 00:15:04,498
flapping around trying to
control the vehicle. We're
274
00:15:04,538 --> 00:15:08,160
betting we might have a little
bit more capability than think
275
00:15:08,200 --> 00:15:10,930
in just the analysis. But...
Always a chance that bed doesn't
276
00:15:10,930 --> 00:15:13,772
pay off, but that just helps us
know, like, what are our limits.
277
00:15:13,772 --> 00:15:16,694
Oh, it's halfway through the
peak heating phase of our trip.
278
00:15:16,694 --> 00:15:18,175
Halfway there. Halfway home,
guys.
279
00:15:18,395 --> 00:15:20,617
Just like the booster, it
re-entered the Earth's
280
00:15:20,677 --> 00:15:23,399
atmosphere horizontally,
bleeding off speed with its
281
00:15:23,499 --> 00:15:26,762
underbelly heat shield, and, as
we've seen on previous flights,
282
00:15:26,942 --> 00:15:30,625
displaying stunning plasma wave
patterns as it descended through
283
00:15:30,625 --> 00:15:31,405
the atmosphere.
284
00:15:32,106 --> 00:15:34,407
Interestingly, however,
sharp-eyed viewers would have
285
00:15:34,427 --> 00:15:37,469
noticed wrinkles or creases
developing on the exposed
286
00:15:37,630 --> 00:15:41,412
surface of the hull midsection
during the descent. It wasn't a
287
00:15:41,432 --> 00:15:44,473
major issue as the underlying
structure kept the whole thing
288
00:15:44,533 --> 00:15:46,714
together, but it was an
interesting point of
289
00:15:46,754 --> 00:15:47,475
observation.
290
00:15:47,975 --> 00:15:50,837
We are also testing out new
secondary thermal protection
291
00:15:51,177 --> 00:15:54,759
materials. So basically, like if
the heat shield isn't in this
292
00:15:54,839 --> 00:15:58,061
one spot, can this other
material protect the metal is
293
00:15:58,241 --> 00:16:00,962
the thinking there. Also
checking of the ship's
294
00:16:01,002 --> 00:16:04,424
structural strength in those
areas where we're looking to add
295
00:16:04,464 --> 00:16:06,145
that ship catch hardware.
296
00:16:06,613 --> 00:16:09,595
Just to see if it survives
entry. As we've been saying,
297
00:16:10,176 --> 00:16:14,359
we've done a lot of calculations
and simulations. Similar to
298
00:16:14,379 --> 00:16:18,361
Flight 5, we are targeting the
same splashdown location in the
299
00:16:18,461 --> 00:16:22,825
Indian Ocean, but we are not
expecting to recover the
300
00:16:22,825 --> 00:16:23,225
vehicle.
301
00:16:23,705 --> 00:16:27,088
The flaps so far are looking
pretty good. We're not seeing
302
00:16:27,368 --> 00:16:28,108
any burn through.
303
00:16:28,268 --> 00:16:30,390
Once we're subsonic,
essentially, so I think that's
304
00:16:30,450 --> 00:16:34,970
about 1,200 kilometers an hour.
Once we're down below that, that
305
00:16:34,970 --> 00:16:37,494
's when we're going to kind of
dip our nose down and get that
306
00:16:37,554 --> 00:16:39,095
more aggressive angle of attack.
307
00:16:39,255 --> 00:16:42,057
Normally we're just belly flop
right into the water, pretty
308
00:16:42,117 --> 00:16:45,779
much that position, but if we're
going to be able to do return to
309
00:16:45,879 --> 00:16:49,020
launch sites, we're going to
want to be able to fly with a
310
00:16:49,020 --> 00:16:51,221
little bit more of an angle of
attack, get you a little bit
311
00:16:51,282 --> 00:16:54,503
more range as you're coming
through. And so this will be
312
00:16:54,583 --> 00:16:57,745
just a test to see quite how far
can we push it.
313
00:16:58,025 --> 00:17:00,946
But obviously, we're going to do
these kind of tests way out here
314
00:17:01,026 --> 00:17:04,748
in super remote areas before you
ever try to bring a ship back to
315
00:17:04,768 --> 00:17:07,369
a place like Starbase. Our ship
remains on a good entry
316
00:17:07,449 --> 00:17:09,810
trajectory. External
temperatures are coming down.
317
00:17:09,870 --> 00:17:13,791
That tells us that we are
through the phase of peak
318
00:17:13,972 --> 00:17:17,853
heating. So we are expecting
these temperatures to continue
319
00:17:17,913 --> 00:17:22,755
to come down. Once again, we are
targeting a soft splashdown in
320
00:17:22,735 --> 00:17:26,957
the Indian Ocean off the
northwest coast of Australia.
321
00:17:27,297 --> 00:17:31,521
And as we get down a little bit
lower, the Raptor engines are in
322
00:17:31,521 --> 00:17:34,724
their chill phase right now. So
just essentially getting them
323
00:17:34,804 --> 00:17:38,567
primed to turn on. We're going
to use those three center
324
00:17:38,627 --> 00:17:42,390
engines to do a landing flip and
then a landing burn. So we'll
325
00:17:42,431 --> 00:17:45,293
come down kind of in that
slightly pointed down belly flop
326
00:17:45,293 --> 00:17:48,796
and then fire off those engines
to flip us around and then do
327
00:17:48,856 --> 00:17:52,059
that final landing burn. All
ship has paused.
328
00:17:52,119 --> 00:17:55,662
We do have some heating there.
On that looks like one of the
329
00:17:55,762 --> 00:18:00,387
forward flaps on Starship. This
is to be expected. We knew that
330
00:18:00,567 --> 00:18:03,690
the vehicle would perform
differently than what we had
331
00:18:03,770 --> 00:18:07,533
seen on Flight 5. It looks like
that heating is starting to cool
332
00:18:07,593 --> 00:18:08,013
off there.
333
00:18:08,354 --> 00:18:11,477
Yeah, it's a little burn
through. Again, it is important
334
00:18:11,577 --> 00:18:16,141
to note when we start seeing
that through the ship's descent.
335
00:18:16,401 --> 00:18:19,062
As well. So like Kate was
saying, we're getting some
336
00:18:19,082 --> 00:18:22,263
really good data here. Looks
like the other flaps are doing a
337
00:18:22,283 --> 00:18:24,543
little better than the one that
has a little burn through, which
338
00:18:24,563 --> 00:18:25,844
is some good news.
339
00:18:26,304 --> 00:18:27,884
It's slowing down on stock one.
340
00:18:27,984 --> 00:18:28,784
And go ahead, Anne.
341
00:18:28,784 --> 00:18:29,545
If it stops at the top.
342
00:18:29,605 --> 00:18:32,986
The body slope remains on a good
trajectory. This is when things
343
00:18:33,206 --> 00:18:35,426
will start to get a little
interesting. So this is when
344
00:18:35,486 --> 00:18:38,727
we're moving slower than the
speed of sound. Nose slowly
345
00:18:38,867 --> 00:18:41,468
start to tip down. And we're
going to try and maintain flap
346
00:18:41,528 --> 00:18:44,349
control the whole way. But we
are just a couple of minutes
347
00:18:44,369 --> 00:18:46,975
away from... Hopefully doing a
landing flip. Landing flip and
348
00:18:46,995 --> 00:18:49,437
landing burn if the flaps can
hold together.
349
00:18:49,637 --> 00:18:52,360
This higher angle of attack,
we're intentionally doing it to
350
00:18:52,540 --> 00:18:56,844
stress those aft flaps. And that
will help inform the limits of
351
00:18:56,964 --> 00:19:00,247
flap control in order to collect
data for future landing
352
00:19:00,307 --> 00:19:00,847
profiles.
353
00:19:01,107 --> 00:19:04,230
We're looking good so far. We've
just got about five kilometers
354
00:19:04,230 --> 00:19:06,953
in altitude to go. We'll ignite
the engines when we're still
355
00:19:06,993 --> 00:19:09,855
just a couple hundred meters
over the ground. Do that flip
356
00:19:10,115 --> 00:19:11,937
and landing. Five kilometers
out.
357
00:19:13,978 --> 00:19:17,039
As with previous test flights,
Starship flipped back to
358
00:19:17,079 --> 00:19:20,741
vertical just before splashing
down on target an hour and five
359
00:19:20,801 --> 00:19:23,902
minutes after launch. The whole
thing being monitored by a
360
00:19:23,942 --> 00:19:26,964
pre-positioned SpaceX buoy
anchored nearby.
361
00:19:27,564 --> 00:19:33,126
Ship is doing great so far.
Engine relighting.
362
00:19:34,947 --> 00:19:38,729
What a great real sensation by
Starship.
363
00:19:50,138 --> 00:19:54,219
All three down to two. And the
last one. Wow.
364
00:19:54,219 --> 00:19:56,460
And we have steps last down in
the Indian Ocean.
365
00:19:56,680 --> 00:20:00,082
And this flight also carried
Starship's first ever biological
366
00:20:00,142 --> 00:20:04,164
payload. It was a banana hanging
all by itself in the cavernous
367
00:20:04,264 --> 00:20:08,125
payload bay. Exactly why it was
put there has been the subject
368
00:20:08,145 --> 00:20:11,679
of some speculation. A camera
did monitor it throughout the
369
00:20:11,719 --> 00:20:15,722
flight, and importantly, it
didn't explode once in space.
370
00:20:16,342 --> 00:20:19,404
So it's fair to say the payload
bay must have remained pressure
371
00:20:19,464 --> 00:20:22,346
tight throughout the mission.
This launch also marked the
372
00:20:22,366 --> 00:20:25,709
quickest turnaround so far
between test flights for what is
373
00:20:25,729 --> 00:20:29,091
the world's largest and most
powerful rocket. And it was the
374
00:20:29,151 --> 00:20:32,613
last test flight for this
specific version of Starship.
375
00:20:33,234 --> 00:20:36,596
The next test will involve an
upgraded version to Starship,
376
00:20:36,716 --> 00:20:39,058
which will have a slightly
altered design with larger fuel
377
00:20:39,138 --> 00:20:39,518
tanks.
378
00:20:40,182 --> 00:20:43,084
Now, theoretically, that could
fly next month, although an
379
00:20:43,125 --> 00:20:46,667
actual launch date is yet to be
set. Meanwhile, work's already
380
00:20:46,748 --> 00:20:49,670
underway on a future third
variant of Starship, which will
381
00:20:49,670 --> 00:20:52,612
include engines three times more
powerful than those currently
382
00:20:52,732 --> 00:20:55,755
used. That should be ready to
fly in about a year.
383
00:20:56,916 --> 00:21:00,119
The massive, gleaming
121-metre-tall stainless steel
384
00:21:00,239 --> 00:21:03,281
rocket is at the heart of Musk's
plans to develop an
385
00:21:03,361 --> 00:21:07,264
interplanetary colonial
transport vehicle, one capable
386
00:21:07,304 --> 00:21:10,427
of carrying 100 people at a
time, on missions to the Moon,
387
00:21:10,647 --> 00:21:15,090
to Mars and beyond. In fact,
using Starship, Musk hopes to
388
00:21:15,130 --> 00:21:18,433
eventually turn humanity into
the first multi-planetary
389
00:21:18,533 --> 00:21:19,153
species.
390
00:21:19,834 --> 00:21:22,876
Current plans will see NASA use
a version of Starship called the
391
00:21:23,116 --> 00:21:26,098
HLS to ferry astronauts and
equipment between the Orion
392
00:21:26,198 --> 00:21:29,540
spacecraft and the Lunar South
Pole as part of the Artemis III
393
00:21:29,620 --> 00:21:31,522
mission in September 2026.
394
00:21:32,446 --> 00:21:35,168
After that, it'll be used to
shuttle people, supplies and
395
00:21:35,168 --> 00:21:38,109
equipment between the Lunar
Gateway Space Station, once it's
396
00:21:38,170 --> 00:21:41,772
positioned in trans-lunar orbit,
and the lunar surface, helping
397
00:21:41,812 --> 00:21:45,334
maintain a permanent human
presence on the Moon. And
398
00:21:45,434 --> 00:21:49,256
Starship doesn't end there. Musk
is also planning to fly an
399
00:21:49,296 --> 00:21:53,238
unmanned version of Starship to
Mars on a test run also in 2026.
400
00:21:53,959 --> 00:21:57,281
That'll coincide with the next
Mars transfer window. That's the
401
00:21:57,321 --> 00:22:00,042
time when the orbits of the
Earth and Mars allow for
402
00:22:00,103 --> 00:22:03,205
journeys between the two planets
to be kept out at just six or
403
00:22:03,245 --> 00:22:07,729
seven months each way. SpaceX
sees Starship as the future of
404
00:22:07,709 --> 00:22:11,993
the company. Eventually, it'll
replace the current Falcon 9 and
405
00:22:12,033 --> 00:22:15,195
Falcon Heavy vehicles, as well
as the Dragon capsule.
406
00:22:15,836 --> 00:22:19,359
And one day, it may even replace
some airline services on
407
00:22:19,459 --> 00:22:23,202
point-to-point journeys between
major cities on Earth, meaning
408
00:22:23,262 --> 00:22:26,385
any point on planet Earth will
be no more than 90 minutes from
409
00:22:26,505 --> 00:22:31,184
any other point. A true glimpse
into the future. This is Space
410
00:22:31,224 --> 00:22:31,664
Time.
411
00:22:32,364 --> 00:22:35,806
Still to come, a new study has
found that Earth's largest iron
412
00:22:35,866 --> 00:22:38,988
ore deposits, found in Western
Australia's Pilbara, are about a
413
00:22:39,048 --> 00:22:42,009
billion years younger than
previously thought. And later in
414
00:22:41,989 --> 00:22:46,051
the Science Report, a new study
warns that global plastic waste
415
00:22:46,251 --> 00:22:49,693
is likely to double by the
middle of this century. All that
416
00:22:49,713 --> 00:22:52,074
and more still to come on Space
Time.
417
00:23:07,934 --> 00:23:10,576
A new study has found that
plenty of the largest iron ore
418
00:23:10,576 --> 00:23:13,358
deposits, which are found in the
Western Australian Pilbara
419
00:23:13,358 --> 00:23:15,980
region, are about a billion
years younger than what was
420
00:23:16,060 --> 00:23:19,643
previously thought. The latest
data places that massive
421
00:23:19,683 --> 00:23:24,366
deposits are between 1.1 and 1.4
billion years of age, far less
422
00:23:24,366 --> 00:23:26,968
than the 2.2 billion years
previously estimated.
423
00:23:27,589 --> 00:23:30,231
The findings are important.
Because they helped establish a
424
00:23:30,271 --> 00:23:33,132
new picture of planet Earth's
geological history at a time
425
00:23:33,132 --> 00:23:36,454
when plate tectonic upheavals
saw ancient supercontinents
426
00:23:36,514 --> 00:23:40,236
begin to break up and subduct
while new ones began forming.
427
00:23:40,896 --> 00:23:43,318
The discovery, reported in the
Journal Of The Proceedings Of
428
00:23:43,298 --> 00:23:45,719
The National Academy Of
Sciences, are based on new
429
00:23:45,819 --> 00:23:48,961
geochronology techniques which
are far more accurate at
430
00:23:49,041 --> 00:23:53,035
measuring the age of iron oxide
minerals. The new research is
431
00:23:53,115 --> 00:23:56,336
able to precisely date minerals
from banded iron formations,
432
00:23:56,476 --> 00:23:59,778
which are ancient underwater
layers of iron-rich rock, and
433
00:23:59,798 --> 00:24:02,400
which provide a significant
insight into Earth's deep
434
00:24:02,500 --> 00:24:03,680
geological past.
435
00:24:04,261 --> 00:24:06,842
The study's lead author, Liam
Courtney Davis from Curtin
436
00:24:06,922 --> 00:24:09,964
University and the University Of
Colorado Boulder, says the
437
00:24:10,124 --> 00:24:13,426
energy from this epic geological
activity likely triggered the
438
00:24:13,426 --> 00:24:16,667
production of billions of tons
of iron-rich rock across the
439
00:24:16,707 --> 00:24:17,148
Pilbara.
440
00:24:18,028 --> 00:24:21,310
Western Australia is the world's
leading producer of iron ore.
441
00:24:21,530 --> 00:24:25,694
Which is Australia's largest
export earner at $131 billion a
442
00:24:25,694 --> 00:24:29,518
year. Until now, the exact
timeline of these formations
443
00:24:29,598 --> 00:24:33,002
changing from 30% iron, as they
originally were, to more than
444
00:24:33,142 --> 00:24:35,884
60% iron, as they are today, was
unclear.
445
00:24:36,205 --> 00:24:38,928
And that hindered science's
understanding of the processes
446
00:24:38,968 --> 00:24:42,162
that led to the formation of
these huge reserves. But the
447
00:24:42,182 --> 00:24:45,324
discovery of a link between
these giant iron ore deposits
448
00:24:45,364 --> 00:24:48,625
and changes in supercontinent
cycles enhances science's
449
00:24:48,685 --> 00:24:51,226
understanding of ancient
geological processes and
450
00:24:51,266 --> 00:24:54,067
improves geologists'ability to
predict exactly where they
451
00:24:54,147 --> 00:24:55,788
should be exploring in the
future.
452
00:24:56,428 --> 00:24:59,830
By using an emerging technique
to date iron oxide minerals
453
00:24:59,870 --> 00:25:02,931
through uranium and lead isotope
analysis within the mineral
454
00:25:02,951 --> 00:25:06,113
grains, the authors were able to
directly date all the major
455
00:25:06,193 --> 00:25:09,374
banded iron formation deposits
in the Hammersley Province.
456
00:25:10,002 --> 00:25:13,225
Courtney Davis says the findings
show that these deposits formed
457
00:25:13,225 --> 00:25:16,728
in conjunction with major
tectonic events, events which
458
00:25:16,888 --> 00:25:20,611
changed planet Earth completely,
highlighting the dynamic nature
459
00:25:20,611 --> 00:25:23,514
of the planet's history and the
complexity of iron ore
460
00:25:23,554 --> 00:25:24,494
mineralisation.
461
00:25:24,695 --> 00:25:28,358
So we've been looking into
redefining what is the age of
462
00:25:28,358 --> 00:25:32,161
the mineralisation within the
banded iron formations in the
463
00:25:32,221 --> 00:25:32,641
Pilbara.
464
00:25:33,302 --> 00:25:36,465
The original banded iron
formations that were laid down
465
00:25:36,765 --> 00:25:40,847
across the Hammersley are very
old these are about 2.45 billion
466
00:25:41,168 --> 00:25:45,010
years old but for them to
actually be a mineral deposit or
467
00:25:44,990 --> 00:25:48,592
an iron ore deposit something
has to happen which transforms
468
00:25:48,652 --> 00:25:52,434
these banded iron formations
from about 40 percent iron 30
469
00:25:52,474 --> 00:25:56,576
percent iron to about 60 65
percent iron and this process
470
00:25:57,116 --> 00:26:00,418
was originally believed to have
happened around two billion
471
00:26:00,458 --> 00:26:04,860
years ago based on evidence from
other minerals in the ore which
472
00:26:05,121 --> 00:26:09,083
were not direct indicators of
the age But now at Curtin
473
00:26:09,143 --> 00:26:11,684
University, we've been
developing instruments and
474
00:26:11,704 --> 00:26:15,245
methods that have allowed us to
actually date iron minerals.
475
00:26:15,285 --> 00:26:18,907
So this is iron oxide minerals
like hematite, which are the
476
00:26:18,927 --> 00:26:22,288
minerals that make up the ore
deposits. And through dating of
477
00:26:22,308 --> 00:26:25,990
these minerals in most of the
major deposits within the
478
00:26:26,010 --> 00:26:28,871
region, we found that they're
about a billion years younger
479
00:26:28,931 --> 00:26:30,432
than we previously understood.
480
00:26:30,632 --> 00:26:32,372
Why does that matter? Why is
that important?
481
00:26:32,372 --> 00:26:35,554
So it's important because if we
want to be able to actually
482
00:26:35,654 --> 00:26:39,096
understand... Where mineral
deposits are sitting within the
483
00:26:39,136 --> 00:26:41,637
crust. And this isn't just for
iron ore, this is for all
484
00:26:41,697 --> 00:26:44,599
commodities like gold or
lithium. We need to have a
485
00:26:44,639 --> 00:26:48,821
really good grasp on how these
ore deposits form. So what was
486
00:26:48,821 --> 00:26:53,003
the tectonic setting? What were
the drivers for mineralization?
487
00:26:53,283 --> 00:26:56,805
What were the processes? So once
we can actually define how your
488
00:26:56,825 --> 00:27:00,988
deposit forms, that gives miners
and explorers a blueprint of how
489
00:27:01,208 --> 00:27:04,550
they might be able to better
adapt exploration to search for
490
00:27:04,650 --> 00:27:07,351
more of these. Deposits because
a lot of these deposits are
491
00:27:07,391 --> 00:27:10,532
dwindling in grade, especially
in the Pilbara, and we need to
492
00:27:10,712 --> 00:27:13,253
really be looking for bigger,
better deposits.
493
00:27:13,413 --> 00:27:16,535
When I think of iron, I think of
something condensing out of a
494
00:27:16,575 --> 00:27:20,997
protoplanetary nebula and then
forming the core of a planet
495
00:27:21,297 --> 00:27:25,639
around a nascent star. I then
think of something that's
496
00:27:25,899 --> 00:27:30,000
upwelled from deep within the
Earth in the form of basalt in a
497
00:27:30,041 --> 00:27:32,862
craton or something and
basically sitting in the
498
00:27:32,882 --> 00:27:36,224
lithosphere. There's a third way
iron ore can form, and that is
499
00:27:36,364 --> 00:27:38,946
it's excreted by some
microorganisms in the sea.
500
00:27:39,267 --> 00:27:43,090
Yeah, so in simplest terms, back
in the day, before there was a
501
00:27:43,110 --> 00:27:46,673
lot of oxygen in the atmosphere,
the oceans were very iron-rich,
502
00:27:46,733 --> 00:27:49,575
and a lot of that iron would
have come from hydrothermal
503
00:27:49,655 --> 00:27:53,998
vents in the ocean. So we had a
really iron-rich ocean. Then we
504
00:27:54,059 --> 00:27:57,201
had a period called the Great
Oxidation Event, which is where
505
00:27:57,341 --> 00:28:01,585
bacteria started reacting,
creating oxygen, which reacted
506
00:28:01,645 --> 00:28:03,186
with iron, and that iron then...
507
00:28:03,386 --> 00:28:07,930
Settled on sea floors to create
bands of iron. These would have
508
00:28:07,970 --> 00:28:12,595
been layers of 30 silica-rich
rocks and then layers of more
509
00:28:12,935 --> 00:28:15,638
iron-rich rocks that were
forming. And this is what we see
510
00:28:15,918 --> 00:28:20,002
in Taradini National Park today,
these nice interlayered rocks of
511
00:28:20,042 --> 00:28:25,447
silica to iron-rich material. So
those rocks are the host of what
512
00:28:25,527 --> 00:28:28,630
is being mined, but those rocks
aren't iron-rich enough.
513
00:28:28,962 --> 00:28:32,844
To actually be mined so there's
a later process which happens
514
00:28:32,884 --> 00:28:37,347
which upgrades the banded iron
formations to be a lot more iron
515
00:28:37,427 --> 00:28:40,308
rich and this is a hydro thermal
process which will basically
516
00:28:40,568 --> 00:28:43,910
leak out all that silica and
introduce more iron and
517
00:28:43,970 --> 00:28:47,652
basically concentrate iron
within certain areas of the
518
00:28:48,012 --> 00:28:51,834
pilgrim this is different from
the vast oceans of iron coming
519
00:28:51,894 --> 00:28:55,156
through great magma flows yeah
yeah completely different
520
00:28:55,196 --> 00:29:00,198
because they would be igneous
deposits You do get, in places
521
00:29:00,238 --> 00:29:03,879
like Karuna in Sweden, you do
get magmatic rocks, which are
522
00:29:03,899 --> 00:29:05,940
very iron-rich, which are mines.
523
00:29:05,980 --> 00:29:09,801
Those are called iron oxide
apatite deposits. But these are
524
00:29:10,121 --> 00:29:14,222
sedimentary deposits, which are
then silicified and then
525
00:29:14,342 --> 00:29:16,903
transformed to be more
iron-rich. So yeah, nothing to
526
00:29:16,923 --> 00:29:20,444
do with mantle upwelling or
igneous magmatic activity.
527
00:29:20,664 --> 00:29:24,405
You used a new geochronology
process in order to determine
528
00:29:24,405 --> 00:29:25,345
the age of these rocks.
529
00:29:25,845 --> 00:29:29,406
There's an instrument called a
laser ablation. Inductionally
530
00:29:29,466 --> 00:29:33,647
coupled plasma mass spectrometer
and with this instrument you can
531
00:29:33,707 --> 00:29:38,349
put in small polished pieces of
rock into the sample's chamber.
532
00:29:38,649 --> 00:29:42,690
This will then do a laser beam
down onto the sample material
533
00:29:42,810 --> 00:29:46,991
and in our case that laser beam
is about 50 microns in diameter
534
00:29:47,171 --> 00:29:51,552
that will ablate a little top
section of that mineral so in
535
00:29:51,552 --> 00:29:55,113
our case hematite it will
transport the ablated material
536
00:29:55,193 --> 00:29:58,114
to the mass spectrometer and
that mass spec will then
537
00:29:58,474 --> 00:30:01,115
separate out different elements
and isotopes.
538
00:30:01,235 --> 00:30:03,956
So what we're looking for is to
be able to measure the ratio
539
00:30:04,196 --> 00:30:07,657
between the uranium and the lead
within that tiny little bit of
540
00:30:07,637 --> 00:30:11,057
the mineral grain because
uranium decays to lead. So if we
541
00:30:11,077 --> 00:30:15,199
know the ratio of that, we can
work out what was the exact time
542
00:30:15,259 --> 00:30:17,279
that that mineral grain
crystallized.
543
00:30:17,339 --> 00:30:20,800
So this is a uranium-lead dating
technique which we've now been
544
00:30:20,860 --> 00:30:25,421
able to develop and adapt to use
with iron oxide minerals because
545
00:30:25,461 --> 00:30:29,182
previously, a lot of the time,
people dated Zircon. And other
546
00:30:29,242 --> 00:30:32,523
minerals which are more amenable
to uranium lead. So this is a
547
00:30:32,543 --> 00:30:34,684
new technique which we're
applying here, but then we're
548
00:30:34,704 --> 00:30:37,325
hoping to use in all different
types of environments.
549
00:30:37,525 --> 00:30:40,886
There was a lot of continental
shifting going on. Tectonic
550
00:30:40,946 --> 00:30:43,386
plates were moving and that
aided in this process.
551
00:30:43,686 --> 00:30:46,747
Yeah, so we've been able to
correlate the periods of the
552
00:30:46,767 --> 00:30:51,368
iron ore formation or the
economic mineralization with
553
00:30:51,448 --> 00:30:55,430
different episodes of
continental breakup and coming
554
00:30:55,470 --> 00:30:58,511
together. And we've noticed...
And it's not just with iron ore,
555
00:30:58,511 --> 00:31:00,032
it's with a lot of different
commodities.
556
00:31:00,252 --> 00:31:03,515
In Western Australia, there
seems to be a time period around
557
00:31:03,715 --> 00:31:07,238
1.3 billion years ago when
different parts of Australia
558
00:31:07,318 --> 00:31:11,261
were amalgamating into more like
the continent we see today. And
559
00:31:11,261 --> 00:31:15,185
it's this tectonic force or
drivers that provide the energy
560
00:31:15,625 --> 00:31:19,288
and hydrothermal fluid that we
need to actually transform the
561
00:31:19,308 --> 00:31:22,991
banded iron formations from just
rock into ore.
562
00:31:23,031 --> 00:31:25,973
We talk about banded iron
formations. What are they?
563
00:31:26,354 --> 00:31:26,734
These are...
564
00:31:26,894 --> 00:31:30,396
Sedimentary deposits and they
have a distinctive rhythmic
565
00:31:30,516 --> 00:31:35,178
banding of reddish iron and
paler silica and these elements
566
00:31:35,239 --> 00:31:39,281
were ultimately laid down on the
seafloor seasonally during the
567
00:31:39,281 --> 00:31:43,443
Great Oxidation Event when
oxygen was reacting with iron in
568
00:31:43,463 --> 00:31:46,384
the ocean then allowing it to
settle out as iron oxide
569
00:31:46,404 --> 00:31:50,106
minerals on the ocean floor
these rocks are in the Pilbara
570
00:31:50,146 --> 00:31:55,930
about 2.45 billion years old and
they're an archive between
571
00:31:56,730 --> 00:31:59,812
continents oceans and atmosphere
through time and they're the
572
00:31:59,832 --> 00:32:03,254
rocks which we now mine for iron
once they've been upgraded if
573
00:32:03,354 --> 00:32:06,496
they're younger what does that
mean other than the fact they
574
00:32:06,516 --> 00:32:09,898
were laid down more recently
well if the iron in the rock is
575
00:32:10,479 --> 00:32:14,081
younger than the actual timing
that it was laid down it means
576
00:32:14,101 --> 00:32:17,603
that there was some kind of
event which concentrated iron
577
00:32:17,703 --> 00:32:21,085
within these rocks to an
economic level which made it
578
00:32:21,445 --> 00:32:24,847
viable for the big exploration
companies to go out there and
579
00:32:24,867 --> 00:32:25,147
mine.
580
00:32:25,207 --> 00:32:27,868
And that's where the plate
tectonic movements come in. Yes.
581
00:32:27,868 --> 00:32:28,749
Where does this take us?
582
00:32:29,229 --> 00:32:33,351
For us, something interesting
would be to be able to further
583
00:32:33,431 --> 00:32:36,472
correlate this with banded iron
formations across the world,
584
00:32:36,532 --> 00:32:39,373
because they're not just in
Western Australia. There's huge
585
00:32:39,433 --> 00:32:43,235
deposits of these formations in
South Africa, Brazil, Lake
586
00:32:43,275 --> 00:32:47,036
Superior region in North
America, Ukraine, and China. So
587
00:32:47,036 --> 00:32:50,438
we really want to be able to
understand when all these
588
00:32:50,458 --> 00:32:51,278
deposits were.
589
00:32:51,458 --> 00:32:54,260
Turning into the iron ore that
we see today. And there's lots
590
00:32:54,260 --> 00:32:57,203
of different connections, like
the banded iron formations in
591
00:32:57,183 --> 00:33:00,025
the Pilbara and South Africa are
the same age. They were laid
592
00:33:00,045 --> 00:33:02,707
down at the same time when these
two countries were joined
593
00:33:02,727 --> 00:33:05,509
together as continents. So we
want to be able to work out when
594
00:33:05,710 --> 00:33:08,292
iron ore was forming across the
world, not just within the
595
00:33:08,312 --> 00:33:08,612
Pilbara.
596
00:33:08,792 --> 00:33:11,754
That's Liam Courtney-Davis from
Curtin University and the
597
00:33:11,834 --> 00:33:15,958
University Of Colorado Boulder.
This is Space Time.
598
00:33:31,752 --> 00:33:33,733
And time now to take a brief
look at some of the other
599
00:33:33,793 --> 00:33:36,475
stories making use in science
this week with the Science
600
00:33:36,516 --> 00:33:40,339
Report. A new study shows that
if you're over the age of 40,
601
00:33:40,539 --> 00:33:43,982
taking an hour-long walk every
day could add years to your
602
00:33:44,062 --> 00:33:44,482
life.
603
00:33:45,122 --> 00:33:47,885
The findings reported in the
British journal Sports Medicine
604
00:33:48,045 --> 00:33:51,287
looked at physical activity and
life expectancy, showing that if
605
00:33:51,387 --> 00:33:54,690
people over the age of 40 were
as physically active as the top
606
00:33:54,750 --> 00:33:57,873
25% of the population, they
could expect to live an extra
607
00:33:58,013 --> 00:34:01,971
five years on average. Or to put
it more simply, for every one
608
00:34:01,991 --> 00:34:05,131
hour long walk you take, it adds
an extra three hours to your
609
00:34:05,191 --> 00:34:05,572
life.
610
00:34:06,192 --> 00:34:09,533
The study also found that the
impact of exercise was greatest
611
00:34:09,533 --> 00:34:12,834
for the least active people, who
could add an extra six hours to
612
00:34:12,854 --> 00:34:16,355
their lives simply by taking
that one hour walk. The authors
613
00:34:16,435 --> 00:34:19,635
say the study proves that the
costs of physical inactivity are
614
00:34:19,755 --> 00:34:21,836
far greater than previously
thought.
615
00:34:23,376 --> 00:34:26,717
A new study has shown that
global plastic waste will double
616
00:34:26,757 --> 00:34:29,959
by the middle of the century if
humans stick. To business as
617
00:34:30,119 --> 00:34:34,321
usual. However, researchers also
found that a mix of policies
618
00:34:34,501 --> 00:34:38,944
could slash plastic waste by up
to 90%. The study reported in
619
00:34:38,924 --> 00:34:42,306
the journal Science also found
that greenhouse gas emissions
620
00:34:42,346 --> 00:34:45,268
from plastic production and
waste management are set to grow
621
00:34:45,348 --> 00:34:48,270
by at least 37% over the same
period.
622
00:34:48,951 --> 00:34:52,553
However, an intelligent mix of
policies could slash plastic
623
00:34:52,633 --> 00:34:56,427
waste by up to 90%. To reach
their conclusions, the authors
624
00:34:56,487 --> 00:34:59,288
simulated eight interventions
currently being considered by
625
00:34:59,308 --> 00:35:02,209
the United Nations Plastic
Pollutions Treaty, finding that
626
00:35:02,309 --> 00:35:05,570
implementing just four could
reduce mismanaged plastic waste
627
00:35:05,570 --> 00:35:09,372
by roughly 91% and
plastic-related emissions by a
628
00:35:09,412 --> 00:35:09,912
third.
629
00:35:11,553 --> 00:35:14,774
A new study has found that
switching to a vegan diet could
630
00:35:14,814 --> 00:35:19,216
lower your food costs by 19%. On
the other hand, switching to a
631
00:35:19,256 --> 00:35:22,718
Mediterranean diet is unlikely
to have any impact on the cost
632
00:35:22,718 --> 00:35:25,894
of your groceries. The study
reported in the Journal Of The
633
00:35:25,894 --> 00:35:29,435
American Medical Association
compared 30 people who started a
634
00:35:29,455 --> 00:35:32,776
vegan diet and 30 people who
started a Mediterranean diet.
635
00:35:33,477 --> 00:35:36,577
And they estimated their food
costs based on several three-day
636
00:35:36,677 --> 00:35:39,398
records of what the participants
ate during the study.
637
00:35:40,158 --> 00:35:42,739
Researchers found the lowered
cost of the vegan diet were
638
00:35:42,759 --> 00:35:46,420
mainly associated with savings
on meat and added fats. And
639
00:35:46,460 --> 00:35:49,701
these savings clearly outweighed
the increased spending on
640
00:35:49,741 --> 00:35:52,522
vegetables, grains, fruits and
meat alternatives.
641
00:35:54,330 --> 00:35:57,852
The 2024 Ben Spoon Award, the
glittering highlight of the
642
00:35:57,852 --> 00:36:00,774
Australian Skeptical Calendar,
has been awarded to the Cancer
643
00:36:00,815 --> 00:36:03,416
Council Of Western Australia for
its endorsement of the
644
00:36:03,436 --> 00:36:06,739
pseudo-medical and unscientific
practices of Reiki and
645
00:36:06,779 --> 00:36:07,659
reflexology.
646
00:36:08,340 --> 00:36:10,881
The award's presented annually
at the Australian Skeptic
647
00:36:10,962 --> 00:36:14,184
Skepticon Conference, which this
year was held in Sydney. It's
648
00:36:14,224 --> 00:36:17,206
presented to the perpetrator of
the most preposterous piece of
649
00:36:17,266 --> 00:36:20,888
paranormal or pseudo-scientific
piffle. The Western Australian
650
00:36:20,948 --> 00:36:23,010
Cancer Council is a registered
charity.
651
00:36:23,702 --> 00:36:26,503
It has the stated purpose of
working with the community to
652
00:36:26,543 --> 00:36:29,524
reduce the incidence and the
impact of cancer based on the
653
00:36:29,544 --> 00:36:32,545
most solid foundations of
evidence available.
654
00:36:33,265 --> 00:36:36,146
However, the Western Australian
Cancer Council says that
655
00:36:36,186 --> 00:36:39,667
complementary therapies such as
massage, beauty treatments and
656
00:36:39,747 --> 00:36:42,847
Reiki, used in conjunction with
conventional medical treatments,
657
00:36:43,028 --> 00:36:46,208
are increasingly considered an
important part of supportive
658
00:36:46,268 --> 00:36:49,529
care, which helps people address
a wide range of challenges
659
00:36:49,649 --> 00:36:51,330
beyond medical treatment or
cancer.
660
00:36:52,006 --> 00:36:54,707
The inclusion of Reiki, which is
a system in which the
661
00:36:54,707 --> 00:36:57,628
practitioner passes their hands
through the air over a patient,
662
00:36:57,808 --> 00:37:00,749
often without touching them,
supposedly helps balance their
663
00:37:00,809 --> 00:37:01,549
energy flows.
664
00:37:02,089 --> 00:37:04,970
And that's especially concerning
for an organisation like the
665
00:37:04,990 --> 00:37:07,591
Cancer Council, which is
designed to help people during
666
00:37:07,611 --> 00:37:10,672
and after their diagnosis for
cancer and subsequent
667
00:37:10,832 --> 00:37:12,053
evidence-based treatments.
668
00:37:12,813 --> 00:37:16,134
Tim Mendham, Executive Officer
for Australian Skeptics, says
669
00:37:16,174 --> 00:37:18,776
for an organization like the
Western Australian Cancer
670
00:37:18,796 --> 00:37:22,099
Council to endorse and add its
imprimatur to pseudoscientific
671
00:37:22,159 --> 00:37:25,202
practices in the name of
well-being is disappointing,
672
00:37:25,402 --> 00:37:27,964
especially when some elements of
the industry, such as the
673
00:37:27,984 --> 00:37:30,746
International Center For Reiki
Training, wrongly claim that
674
00:37:30,866 --> 00:37:32,488
Reiki can actually cure cancer.
675
00:37:33,268 --> 00:37:36,711
Mendham says opening the door to
pseudo and unscientific medical
676
00:37:36,771 --> 00:37:39,493
treatments in the name of
well-being is simply not
677
00:37:39,533 --> 00:37:43,337
acceptable. Reiki and
reflexology were both recently
678
00:37:43,417 --> 00:37:46,499
included in the list of
therapies no longer covered by
679
00:37:46,519 --> 00:37:47,539
the NDIS.
680
00:37:48,219 --> 00:37:51,461
Runners-up for this year's Bent
Spoon included Ellie McPherson
681
00:37:51,541 --> 00:37:53,902
for her own treatment for
cancer, and especially her
682
00:37:53,942 --> 00:37:56,863
medical consultant, Simone
Lubeshere, the latter claiming a
683
00:37:56,903 --> 00:37:59,324
string of spurious medical
qualifications.
684
00:37:59,884 --> 00:38:03,386
A dishonourable mention went to
Channel 7 News for endorsing
685
00:38:03,426 --> 00:38:07,307
astrology, weather control, and
unsubstantiated autism
686
00:38:07,367 --> 00:38:10,529
treatments. The Western
Australian Cancer Council now
687
00:38:10,649 --> 00:38:13,150
joins an illustrious rogues
gallery of...
688
00:38:13,290 --> 00:38:16,231
Past Bent Spoon winners,
including Walkley Award-winning
689
00:38:16,291 --> 00:38:19,373
journalist and UFO proponent
Ross Coulthard, former celebrity
690
00:38:19,453 --> 00:38:22,114
chef Pete Evans, who's actually
won the award twice, the
691
00:38:22,214 --> 00:38:25,876
Australian Vaccination Network,
which opposes vaccinations, a
692
00:38:25,896 --> 00:38:30,398
psychic dentist, and both the
broadcasting networks ABC and
693
00:38:30,679 --> 00:38:35,573
SBS. My, how the once great have
fallen. This is Space Time.
694
00:38:51,382 --> 00:38:55,184
That's the show for now. Space
Time is available every Monday,
695
00:38:55,304 --> 00:38:58,306
Wednesday and Friday through
Apple Podcasts, ITunes,
696
00:38:58,626 --> 00:39:02,992
Stitcher, Google Podcasts,
Talker Casts, Spotify. Acast,
697
00:39:03,233 --> 00:39:07,335
Amazon Music, Bytes.Com,
SoundCloud, YouTube, your
698
00:39:07,395 --> 00:39:10,577
favorite podcast download
provider, and from Spacetime
699
00:39:10,597 --> 00:39:12,058
with StuartGarry.Com.
700
00:39:12,818 --> 00:39:15,360
Spacetime's also broadcast
through the National Science
701
00:39:15,380 --> 00:39:19,342
Foundation on Science Zone Radio
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702
00:39:19,462 --> 00:39:23,244
TuneIn Radio. And you can help
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703
00:39:23,244 --> 00:39:26,406
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704
00:39:26,446 --> 00:39:29,348
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705
00:39:29,588 --> 00:39:32,630
Which gives you access to triple
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706
00:39:32,630 --> 00:39:35,591
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707
00:39:35,671 --> 00:39:39,073
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708
00:39:39,193 --> 00:39:43,415
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spacetimewithstuartgary.com for
709
00:39:43,455 --> 00:39:46,877
full details. You've been
listening to Spacetime with
710
00:39:46,937 --> 00:39:47,578
Stuart Gary.
711
00:39:48,318 --> 00:39:51,039
This has been another quality
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712
00:39:51,179 --> 00:39:52,040
Bytes.Com.