S03E16: Cosmic Conundrums: Eclipse Essentials and Euclid's Icy Encounter

WEBVTT

1
00:00:00.240 --> 00:00:03.799
Good morning, good afternoon, and
good evening. It's Steve with another episode

2
00:00:03.839 --> 00:00:08.359
of Astronomy Daily. It is the
twenty fifth of March twenty twenty four,

3
00:00:11.199 --> 00:00:16.800
the podcast and your whole Steve,
don't cue. Oh and we're straight into

4
00:00:16.839 --> 00:00:20.839
it for another episode of Astronomy Daily. Thanks for joining us again on this

5
00:00:20.960 --> 00:00:24.399
perfect, perfect day. Look,
I don't want to brag or anything,

6
00:00:24.399 --> 00:00:28.359
but down here in Australia we have
got the best of everything. Did I

7
00:00:28.480 --> 00:00:32.640
mention that we've got the best of
everything? Despite the fact that everything here

8
00:00:32.679 --> 00:00:38.359
can kill you. They balance They
balance it by giving us the best of

9
00:00:38.320 --> 00:00:41.320
everything, the best beaches, the
best mountains, the best lakes, the

10
00:00:41.359 --> 00:00:46.799
best rivers, the best weather.
When the weather doesn't try and kill you

11
00:00:46.880 --> 00:00:51.520
as well, it's pretty amazing.
Anyway, today was fantastic. That's what

12
00:00:51.560 --> 00:00:55.439
I'm getting at. It's just stunning
in every possible way. But anyway,

13
00:00:56.200 --> 00:01:00.159
today we've got a couple of really
amazing stories for you. Something very hopefu

14
00:01:00.520 --> 00:01:03.679
skywatchers in the Northern Hemisphere. There's
a big event, as you know,

15
00:01:03.799 --> 00:01:07.760
coming up, and we've got an
update from the dart mission. That's the

16
00:01:07.799 --> 00:01:11.519
one that, as you know,
the one that collided with the asteroid.

17
00:01:11.640 --> 00:01:15.040
Ah, here she is, Halle. That's exactly the one I'm talking about.

18
00:01:15.359 --> 00:01:19.840
And it looks like they've got some
very surprising results there. And what

19
00:01:19.040 --> 00:01:23.760
else, Well, you remember the
EUCLID mission. That's the one making a

20
00:01:23.840 --> 00:01:26.560
three D map of the universe on
the ball as usual, Halle, that's

21
00:01:26.599 --> 00:01:30.480
exactly the mission we're talking about.
They launched it to make a three D

22
00:01:30.640 --> 00:01:34.439
map of the universe. That's a
pretty big mission. So what's up,

23
00:01:34.640 --> 00:01:38.280
well, Halle, ice is the
problem and we'll find out how they deal

24
00:01:38.319 --> 00:01:44.200
with ice from back here on Earth. It's pretty clever and pretty simple.

25
00:01:44.400 --> 00:01:49.640
Clever and simple sounds like someone I
know. Oh thanks, Halle. I

26
00:01:49.680 --> 00:01:53.959
think anyway, they're working on a
solution that is indeed clever and simbol as

27
00:01:55.040 --> 00:01:59.400
all good solutions are true enough then, and what have you got for us,

28
00:01:59.439 --> 00:02:02.920
Halle? I'm looking at cancer research
in space. Oh that's great.

29
00:02:04.159 --> 00:02:08.080
Like I was talking to some people
this week about astronauts and the ISS and

30
00:02:08.120 --> 00:02:12.560
the research that goes on there.
They were saying, what do those astronauts

31
00:02:12.560 --> 00:02:15.759
do on the ISS. This might
answer some of those questions, and it's

32
00:02:15.800 --> 00:02:20.680
real world changing research too. Also, very soon there will be a massive

33
00:02:20.680 --> 00:02:24.639
eclipse spanning the United States all the
way from Mexico to northeast Canada. Oh.

34
00:02:24.719 --> 00:02:30.199
Yes, millions will see that all
across the northern hemisphere. And even

35
00:02:30.240 --> 00:02:31.840
though we won't be able to see
it on our side of the world,

36
00:02:32.120 --> 00:02:38.080
take notes, flat earthers. Yes, you're funny, Steve, but my

37
00:02:38.240 --> 00:02:40.960
story is for all you skywatchers to
be safe. Eclips watchers. Ah,

38
00:02:42.080 --> 00:02:45.919
yes, that's right. Just because
it's an eclipse doesn't mean it can't damage

39
00:02:45.960 --> 00:02:50.960
your eyesight for good. Right,
So on with the show. She's old

40
00:02:50.960 --> 00:02:54.879
business today, everybody, it's all
yours, hallie, here we go.

41
00:02:57.759 --> 00:03:01.400
Experiments in the weightless environment of space
have led to crazy progress in the fight

42
00:03:01.439 --> 00:03:07.319
against cancer. NASA officials said space
is a unique place for research. Astronaut

43
00:03:07.360 --> 00:03:12.719
Frank Rubio said at the event in
Washington. The forty eight year old,

44
00:03:12.840 --> 00:03:17.560
a physician and former military helicopter pilot, conducted cancer research during his recent mission

45
00:03:17.599 --> 00:03:23.680
to the International Space Station, orbiting
some four hundred kilometers two hundred and fifty

46
00:03:23.719 --> 00:03:28.919
miles above the Earth's surface. Not
only do cells their age more rapidly,

47
00:03:29.080 --> 00:03:34.360
speeding up research, their structures are
also described as of purer They all don't

48
00:03:34.400 --> 00:03:38.439
clump together as they do on Earth. Because of gravity, they are suspended

49
00:03:38.479 --> 00:03:44.560
in space, enabling better analysis of
their molecular structures, said NASA chief Bill

50
00:03:44.599 --> 00:03:50.479
Nelson. Research conducted in space can
help make cancer drugs more effective. Nelson

51
00:03:50.560 --> 00:03:55.120
added, pharmaceutical giant Merk has conducted
research on the iss with qui Trudah,

52
00:03:55.280 --> 00:04:01.159
an anti cancer drug that patients now
receive intravenously. Its key ingredient is difficult

53
00:04:01.240 --> 00:04:08.120
to transform into a liquid. One
solution is crystallization, a process often used

54
00:04:08.120 --> 00:04:13.879
in drug manufacturing. In two thousand
seventeen, Merk conducted experiments to see if

55
00:04:13.879 --> 00:04:17.639
the crystals would form more rapidly in
space than on Earth. Thanks to such

56
00:04:17.680 --> 00:04:21.120
research, researchers will be able to
make a drug that can be administered by

57
00:04:21.160 --> 00:04:26.759
injection in a doctor's office instead of
through long and painful chemotherapy treatments. He

58
00:04:26.879 --> 00:04:32.560
added, A solar eclipse will be
visible across North America on April eighth.

59
00:04:33.279 --> 00:04:36.560
Every one in the US will see
at least a partial solar eclipse, but

60
00:04:36.680 --> 00:04:41.759
only those within the one hundred and
fifteen mile wide one hundred and eighty five

61
00:04:41.839 --> 00:04:46.199
kilometers path of totality will witness the
Sun's face completely blocked by the Moon's shadow

62
00:04:46.279 --> 00:04:51.319
for up to four minutes twenty eight
seconds. Only during totality, when the

63
00:04:51.399 --> 00:04:56.319
Sun's face is completely blocked, is
it safe to look at the totally eclipsed

64
00:04:56.399 --> 00:05:00.160
Sun's corona with the naked eye.
At all other times, including during the

65
00:05:00.199 --> 00:05:04.439
partial phase of the eclipse, you
must wear certified solar eclipse glasses to view

66
00:05:04.480 --> 00:05:09.480
the Sun. There are some safety
issues to be aware of at other times

67
00:05:09.519 --> 00:05:14.240
too. Here are six tips to
ensure a safe and enjoyable viewing of the

68
00:05:14.240 --> 00:05:19.800
solar eclipse. Number one, don't
ever use ordinary sunglasses to protect your eyes.

69
00:05:20.759 --> 00:05:25.920
They won't help one bit. Even
filters that are meant for goggles,

70
00:05:26.120 --> 00:05:30.439
cameras, telescopes, and binoculars are
useless to protect your eyes. Tip two.

71
00:05:31.480 --> 00:05:36.759
Know when to use only approved eclipse
safety glasses. Solar eclipse glasses must

72
00:05:36.759 --> 00:05:41.079
be used to look at the Sun
only during the brief moment of totality,

73
00:05:41.160 --> 00:05:45.519
when the Moon fully obscures the Sun. Can you remove them? Tip number

74
00:05:45.560 --> 00:05:49.759
three Be prepared to travel. Although
the path of totality on April eighth will

75
00:05:49.759 --> 00:05:55.519
include several major cities and metropolitan areas, it crosses a lot of backcountry.

76
00:05:56.439 --> 00:06:00.920
Many people will chase clear skies which
could take them to areas they hadn't planned

77
00:06:00.920 --> 00:06:05.000
on visiting. Remote parts of Texas, Arkansas, Missouri, New York,

78
00:06:05.240 --> 00:06:11.120
Vermont, New Hampshire, and Maine
in particular are short on facilities and gas

79
00:06:11.199 --> 00:06:15.399
stations, so bring everything you need, including a full fuel tank and extra

80
00:06:15.480 --> 00:06:21.079
food, water, cash, and
toilet paper. Number four. It might

81
00:06:21.160 --> 00:06:26.959
seem obvious, but pay attention to
the weather in April. You can expect

82
00:06:27.000 --> 00:06:30.800
the unexpected, with everything from snow
in the Northeast to tornadoes in the Midwest.

83
00:06:31.720 --> 00:06:36.040
In remote areas of the northeastern US
and Canada, the mountains, lakes

84
00:06:36.040 --> 00:06:41.480
and forests may provide a beautiful backdrop, but conditions in the back country that

85
00:06:41.600 --> 00:06:46.240
time of year can be difficult.
Number five. Be careful in the cities.

86
00:06:47.160 --> 00:06:50.879
If you decide to watch the eclipse
from a city sidewalk, perhaps even

87
00:06:50.959 --> 00:06:56.480
during a lunch break at work,
then watch out. Wandering into roads and

88
00:06:56.560 --> 00:07:00.480
other dangerous situations is easier than you
might think. When you're looking through solar

89
00:07:00.519 --> 00:07:05.000
eclipse classes. The best, easiest
and safest eclipse observing site is an open

90
00:07:05.040 --> 00:07:09.480
space or park, which will likely
have a much better view of the eclipse

91
00:07:09.519 --> 00:07:15.199
than city streets where buildings could easily
block the view. The biggest cities inside

92
00:07:15.199 --> 00:07:18.720
the path are Mazat, Lawn and
Tourrean, Mexico, San Antonio, Austin

93
00:07:18.800 --> 00:07:25.000
and Dallas, Texas, Indianapolis,
Indiana, Hamilton, Ontario, Montreal,

94
00:07:25.079 --> 00:07:30.040
Quebec. Number six and you're probably
getting the picture by now. An eclipse

95
00:07:30.040 --> 00:07:33.839
this big can be a pretty big
hazard for the unwary and the unprepared,

96
00:07:34.759 --> 00:07:40.279
So in the cities, be careful, don't blindly walk out onto roads,

97
00:07:40.319 --> 00:07:45.199
and always be aware of your surroundings. Relocating at the last minute in search

98
00:07:45.240 --> 00:07:48.480
of clear weather is not particularly recommended
unless the roads are clear and you have

99
00:07:48.560 --> 00:07:54.240
multiple backup plans. A great way
to begin your research is to use an

100
00:07:54.240 --> 00:08:00.040
interactive eclipse map and note the eclipse
schedules for various locations in advance. The

101
00:08:00.120 --> 00:08:03.959
great option is to download the Solar
Eclipse Timer app, which provides audio commentary

102
00:08:05.079 --> 00:08:07.839
on exactly what to expect and when
to expect it, and instantly tells you

103
00:08:07.920 --> 00:08:13.959
if you're inside the path of totality. So enjoy the eclipse and stay safe.

104
00:08:15.040 --> 00:08:24.199
Back to you favorite human, Oh
well, thank you for sticking with

105
00:08:24.279 --> 00:08:28.040
us, everybody, and don't forget
to visit our new yourel to check out

106
00:08:28.079 --> 00:08:31.759
all the back editions of Astronomy Daily. Of course, we've made it very

107
00:08:31.759 --> 00:08:37.519
easy now just go to Astronomydaily dot
io. That's Astronomy Daily dot io.

108
00:08:37.679 --> 00:08:43.399
And if you'd like to receive the
now famous Astronomy Daily newsletter in your email

109
00:08:43.480 --> 00:08:46.000
each day, just like Hallie and
I do, pop your email address into

110
00:08:46.039 --> 00:08:50.360
the slot provided, and don't forget. You can still visit us on the

111
00:08:50.480 --> 00:08:54.120
Space Nuts podcast group page. That's
a bit of a mouthful, I know,

112
00:08:56.039 --> 00:09:00.840
on Facebook and on our new X
page that's formally Twitter. Now we're

113
00:09:00.840 --> 00:09:03.600
going to keep saying that, don't
we ex formally Twitter? And the address

114
00:09:03.679 --> 00:09:09.799
there is at astro Daily Pod.
That sounds like something out of two thousand

115
00:09:09.799 --> 00:09:13.799
and one, doesn't it. At
Astro Daily Pod. And as they're saying

116
00:09:13.799 --> 00:09:16.679
the funny pages, Bob's your uncle, Bob, He's not really unless you

117
00:09:16.759 --> 00:09:20.759
actually have an uncle called Bob or
Robert. That's very confusing. Have the

118
00:09:20.799 --> 00:09:24.279
Boffin's been up in messing with your
literal circuits again, Halle? It's just

119
00:09:24.320 --> 00:09:28.639
a saying, Halle, why would
everyone have an uncle with the same name?

120
00:09:28.879 --> 00:09:33.360
How could that even be possible?
It's not Halle, no, no,

121
00:09:33.360 --> 00:09:46.039
no. Just play the promo Halle
please Astra Daly the podcast. Well,

122
00:09:46.080 --> 00:09:50.960
it may come as no surprise that
it's very cold in space, and

123
00:09:50.360 --> 00:09:56.159
those of you who have been following
the travels of EUCLID, a probe sent

124
00:09:56.279 --> 00:10:01.159
out to map the universe, you
will probably be assuming that some of its

125
00:10:01.200 --> 00:10:05.720
senses may be reacting to the cold, and that's exactly what's happening, as

126
00:10:05.840 --> 00:10:11.879
ice is starting to cloud euclid's optics. On July first, twenty twenty three,

127
00:10:11.960 --> 00:10:16.519
the European Space Agency launched the EUCLID
Observatory emission that will spend the next

128
00:10:16.559 --> 00:10:22.440
six years investigating the composition and evolution
of the universe. In particular, EUCLID

129
00:10:22.559 --> 00:10:28.039
will observe how the universe has expanded
over the last ten billion years to test

130
00:10:28.120 --> 00:10:33.440
theories about dark energy. I know
I've had a bit of dark energy lately.

131
00:10:33.480 --> 00:10:37.159
You'll have to forgive me for that. While find jurning the calibrating the

132
00:10:37.519 --> 00:10:43.279
telescopes's instruments in preparation for the mission's
first survey, the mission team noticed that

133
00:10:43.320 --> 00:10:48.480
a few layers of water ice formed
on its mirrors after entering in the freezing

134
00:10:48.480 --> 00:10:54.639
cold of space. While common,
this is a problem for highly sensitive missions

135
00:10:54.799 --> 00:11:01.080
like Leuclid, which requires remarkable precision
to investigate cosmic expand. After months of

136
00:11:01.200 --> 00:11:07.240
research, the EUCLID team tested a
newly designed procedure to de ice the mission's

137
00:11:07.279 --> 00:11:11.080
optics. On March twentieth, the
ESA announced that the team's de icing approach

138
00:11:11.159 --> 00:11:16.840
worked so far and that euclid's vision
had been restored. If the method proved

139
00:11:16.879 --> 00:11:22.440
successful, it will have validated the
mission team's plan to keep euclid's optical system

140
00:11:22.559 --> 00:11:26.759
working for the rest of the mission. It was always expected that there would

141
00:11:26.799 --> 00:11:31.679
be some water contamination with EUCLID,
which is why there was an outgasing campaign

142
00:11:33.039 --> 00:11:37.879
shortly after launch. This consisted of
the telescope being warmed up by onboard heaters

143
00:11:37.960 --> 00:11:43.200
and also partially exposed to the sun, sublimating most of the water brought from

144
00:11:43.240 --> 00:11:50.000
Earth. However, a considerable amount
remained after being absorbed in the telescope's multi

145
00:11:50.080 --> 00:11:54.200
layer insulation, which slowly began building
up on the vis instrument's mirror surfaces.

146
00:11:54.480 --> 00:11:58.679
After months of research, lab studies
and calibrations, the team determined the source

147
00:11:58.759 --> 00:12:03.480
and began working on a solution.
The obvious solution was to heat EUCLID again

148
00:12:03.559 --> 00:12:09.120
by running all its internal heaters for
days. However, this ran risk of

149
00:12:09.159 --> 00:12:13.879
deforming the mechanical structure of the spacecraft, which could alter euclid's optical alignment,

150
00:12:15.279 --> 00:12:20.679
said Andreas Randolph, who is euclid's
flight director at ESA's Mission Control. The

151
00:12:20.720 --> 00:12:24.799
team began by individually heating two of
euclid's mirrors independently, a low risk approach

152
00:12:26.120 --> 00:12:30.879
since they are located in areas where
water vapor was not likely to contaminate other

153
00:12:30.919 --> 00:12:35.240
instruments. However, the response to
this problem highlights the international cooperation that made

154
00:12:35.279 --> 00:12:41.039
this mission possible, said Ralph Coley, euclid's instrument operations scientist. In addition,

155
00:12:41.480 --> 00:12:46.120
this issue could lead to vital research
on how to maintain missions where highly

156
00:12:46.159 --> 00:12:52.120
sensitive optics are concerned. Despite how
common this issue is for spacecraft, there

157
00:12:52.200 --> 00:12:56.000
is very little research on how ice
forms on optical mirrors and impacts observations.

158
00:12:56.480 --> 00:13:01.679
The solution devised by the mission team
and agent he could lead to new procedures

159
00:13:01.759 --> 00:13:05.360
for future missions. These could come
in handy when EUCLID is joined by NASA's

160
00:13:05.519 --> 00:13:11.879
Nancy Grace Roman Space Telescope in March
twenty twenty seven, another mission that will

161
00:13:11.879 --> 00:13:20.120
explore the dark universe Astronomy Adobe with
Steve and Halley Space, Space Science and

162
00:13:20.200 --> 00:13:28.279
Astronomy. Hey remember that time we
rammed a space probe into an asteroid to

163
00:13:28.320 --> 00:13:33.159
take revenge for the destruction of the
dinosaurs. As that was all about no

164
00:13:33.360 --> 00:13:37.840
anyway, Yeah, that was the
old DHUT mission, not the old DART

165
00:13:37.879 --> 00:13:41.399
mission that it was only two years
ago. On September twenty six, twenty

166
00:13:41.480 --> 00:13:46.679
twenty two, NASA's Double Asteroid Redirection
Test DART was a great name. Spacecraft

167
00:13:46.720 --> 00:13:50.960
slammed into the side of one hundred
and seventy meter wide asteroid Dimorphous to test

168
00:13:52.000 --> 00:13:56.559
the future asteroid deflection tactics in the
event of an asteroid that might be threatening

169
00:13:56.600 --> 00:14:03.559
Earth. Following the impact, DART
teams confirmed that the spacecraft's collision with the

170
00:14:03.919 --> 00:14:09.399
asteroid had successfully deflected the asteroid.
Actually, I think I got my wires

171
00:14:09.399 --> 00:14:11.480
cross. That's not the one that
fired the bullet into the asteroid. That

172
00:14:11.559 --> 00:14:16.159
was the Japanese haibusamission. Got my
wires cross. Following the impact, DART

173
00:14:16.320 --> 00:14:22.039
teams confirmed that the spacecraft's collision with
the asteroid had successfully deflected the asteroid by

174
00:14:22.039 --> 00:14:28.279
a small amount, proving the design
of the deflector and allowing scientists and engineers

175
00:14:28.320 --> 00:14:33.799
to better understand the ways we can
protect Earth from asteroids. However, a

176
00:14:33.879 --> 00:14:37.440
new study from a group of scientists
shows that darts collision with Demorphos not only

177
00:14:37.519 --> 00:14:43.000
changed the shape of its orbit around
the host asteroid Didymus, but also significantly

178
00:14:43.120 --> 00:14:48.320
changed the shape of the asteroid itself. Before the collision, Domorphos was known

179
00:14:48.360 --> 00:14:54.279
to be a roughly symmetrical oblate spheroid. Now I know a few fellas like

180
00:14:54.279 --> 00:15:00.799
that shaped asteroid similar to a squished
ball. Sorry, fellas, that is

181
00:15:00.879 --> 00:15:03.720
wider than it is tall. Oh
it's getting worse, isn't it. Additionally,

182
00:15:03.799 --> 00:15:09.120
it took the asteroid around eleven hours
and fifty five minutes you could say,

183
00:15:09.120 --> 00:15:13.960
almost twelve hours to complete one orbit
around Dinamers, which as mentioned,

184
00:15:15.039 --> 00:15:22.279
had been altered following Dart's impact with
Dimorphous. When Dart made impact, things

185
00:15:22.320 --> 00:15:26.639
got very interesting. Dimorphous orbit no
longer, it was no longer circular,

186
00:15:26.799 --> 00:15:33.519
and its orbital period is now thirty
three minutes and fifteen seconds shorter, and

187
00:15:33.559 --> 00:15:43.000
the entire shape of the asteroid has
changed from relatively symmetrical to ariaxical triaxial ellipsoid,

188
00:15:43.279 --> 00:15:50.399
something more like an oblong watermelon,
said navigation engineer Shentanu Nadu of NASA's

189
00:15:50.480 --> 00:15:58.200
Jet Propulsional Laboratory JPL in California.
The DSN Goldstone Solar System Radar was now

190
00:15:58.320 --> 00:16:03.399
second data source, which is located
in Barstow, California. Using Dart's impact

191
00:16:03.440 --> 00:16:10.799
sequence, the Goldstone radar bounced radio
waves off Dimorphos and Dinnamus to measure the

192
00:16:10.840 --> 00:16:17.480
position and velocity of Domorphos and dinamis
precisely before and after Dart's collision. These

193
00:16:17.519 --> 00:16:23.240
measurements are what allowed NASA's team to
quickly discern whether or not dt darts impact

194
00:16:23.320 --> 00:16:30.759
had indeed deflected Dimorphos in its orbit
around Didnamis. Teams would eventually find that

195
00:16:30.840 --> 00:16:36.000
the effect of Dart's impact on the
asteroid greatly exceeded the minimum expectations for the

196
00:16:36.039 --> 00:16:44.360
mission final The final and most significant
data source utilized in Nadu Edal's study was

197
00:16:44.919 --> 00:16:49.559
ground telescopes located around Earth that measured
the light curve how sunlight reflects on the

198
00:16:49.639 --> 00:16:56.039
surface of the asteroids over time from
both asteroids. Comparing the asteroids lightcurves before

199
00:16:56.080 --> 00:17:00.000
and after impact allowed the team to
determine more about how Dart had or altered

200
00:17:00.000 --> 00:17:06.119
domorphis position around Dinymis. We used
the timing of this precise series of light

201
00:17:06.200 --> 00:17:10.359
curve dips to deduce the shape of
the orbit, and because our models were

202
00:17:10.400 --> 00:17:15.839
so sensitive, we could figure also
out the shape of the asteroid before impact.

203
00:17:15.160 --> 00:17:22.000
Chesley continued, the times of the
events occurred regularly, allowing the circular

204
00:17:22.119 --> 00:17:26.599
orbit following the impact. There were
very slight timing differences showing something was askew.

205
00:17:26.640 --> 00:17:30.000
We never expected to get this kind
of accuracy, said co author Steve

206
00:17:30.079 --> 00:17:33.920
Chesley. At JPL nay do even
confirm that their models were so sensitive that

207
00:17:33.960 --> 00:17:38.559
they were able to detect a slight
back and forth rocking of Domorphis as it

208
00:17:38.680 --> 00:17:44.599
orbits around Dinymis. What's more,
they do at El's models were also able

209
00:17:44.680 --> 00:17:49.240
to calculate how Domorphus's orbital period around
Dinimus was altered and evolved over time.

210
00:17:49.359 --> 00:17:56.200
Immediately following impact, teams found that
Dart had reduced domorphous orbitaled period by thirty

211
00:17:56.200 --> 00:18:00.200
two minutes and forty two seconds,
making its total orbital pure period around dinnimers

212
00:18:00.200 --> 00:18:04.079
eleven hours, twenty two minutes,
and thirty three seconds. However, the

213
00:18:04.119 --> 00:18:10.960
asteroids orbit would continue to shorten as
the asteroid continually lost more and more surface

214
00:18:11.039 --> 00:18:17.440
material from the impact to space.
Dimorphos's orbital period would finally settle to be

215
00:18:17.519 --> 00:18:22.680
approximately eleven hours, twenty two minutes
and three whole seconds, meaning that Data's

216
00:18:22.720 --> 00:18:26.599
impact officially altered the orbit of the
asteroid by thirty three minutes and fifteen seconds.

217
00:18:27.000 --> 00:18:33.720
The scientist's calculations are accurate to within
one point five seconds and now sits

218
00:18:33.759 --> 00:18:37.039
at a Results of this study agree
with the others that are being published.

219
00:18:37.920 --> 00:18:41.400
Separate groups analyze the data and independently
come out to the same conclusions. Is

220
00:18:41.440 --> 00:18:47.240
a hallmark of solid scientific result.
Data is not only showing us the pathway

221
00:18:47.279 --> 00:18:52.920
to an asteroid deflection technology, it
is revealing new fundamental understanding of what asteroids

222
00:18:52.960 --> 00:18:56.799
are and how they behave, said
NASA's lead Scientists for Solar Systems Small Bodies,

223
00:18:56.839 --> 00:19:03.319
Tom Statler of NASA's hate in Washington, DC. The results from Nadou

224
00:19:03.359 --> 00:19:08.319
Etl's study, along with observations of
material left around Dimorphous after the impact,

225
00:19:08.359 --> 00:19:15.319
indicate that Dimorphous is a loosely packed
rubble pile asteroid similar to asteroid Benu.

226
00:19:15.640 --> 00:19:22.200
That was visited and sampled by NASA's
a Cyrus Rex mission. The European Space

227
00:19:22.240 --> 00:19:27.680
Agency's upcoming Hero mission will travel back
out to Didymus Dimorphis system to further investigate

228
00:19:27.680 --> 00:19:36.359
the long term changes made to dimorphous
by darts impact. And that's it for

229
00:19:36.400 --> 00:19:40.519
another episode of Astronomy Daily featuring Me, Flesh and Blood, Steve, and

230
00:19:40.599 --> 00:19:44.440
my digital pal Who's fun to be
with? Hallie? I am fun to

231
00:19:44.519 --> 00:19:47.680
be with. I'm going to have
to check your batteries, Hallie. I

232
00:19:47.839 --> 00:19:51.880
like that story about the Dart mission. I know you love asteroid stories too.

233
00:19:52.480 --> 00:19:53.720
Yes, they are my favorite.
I know. I keep saying that,

234
00:19:53.759 --> 00:19:57.559
which reminds me howe. I saw
a great story about drilling for water

235
00:19:57.599 --> 00:20:00.640
on Mars, which I wanted to
get to today, but I ran out

236
00:20:00.680 --> 00:20:04.279
of time. So folks go and
check it out on the Astronomy Daily newsletter.

237
00:20:04.720 --> 00:20:08.640
It's a terrific story and it'll get
your imagination wearing just like mine.

238
00:20:08.880 --> 00:20:12.160
I've read it. Great stuff.
So that's it for another day. I

239
00:20:12.160 --> 00:20:15.599
guess I'll see you next week,
Halle, unless I see you first for

240
00:20:15.720 --> 00:20:22.720
sure. Bye Halle, Bye everyone, Bye the podcast. I mean to

241
00:20:22.759 --> 00:20:25.319
be your whole Steeds don't cut