March 24, 2026

Artemis II Countdown, Auroras Over Sydney, and the Lava World That Broke the Rules

Artemis II Countdown, Auroras Over Sydney, and the Lava World That Broke the Rules
Artemis II Countdown, Auroras Over Sydney, and the Lava World That Broke the Rules
Space News Today
Artemis II Countdown, Auroras Over Sydney, and the Lava World That Broke the Rules

Thank you for listening to Astronomy Daily! Here's everything from today's episode: Story 1: Artemis II — T-Minus Days to Launch NASA is targeting April 1, 2026 for the launch of Artemis II — the first crewed lunar flyby since Apollo 17 in 1972. The crew of Reid Wiseman, Victor Glover, Christina Koch, and Jeremy Hansen will fly a 10-day free-return trajectory around the Moon aboard the Orion spacecraft on the SLS rocket from Kennedy Space Center. The six-day launch window runs April 1–6. Meanwhile, a new analysis suggests the mission could face elevated solar superflare risk, though NASA is proceeding after a successful Flight Readiness Review. Source: NASA — https://www.nasa.gov/mission/artemis-ii/ Solar risk analysis: https://www.space.com/space-exploration/artemis/artemis-2-moon-mission-shouldnt-launch-until-late-2026-new-analysis-of-solar-superflares-suggests Story 2: G3 Geomagnetic Storm & Aurora Australis Multiple coronal mass ejections from the Sun triggered a G3 (strong) geomagnetic storm, producing vivid auroral displays from New York to Scotland to — remarkably — Melbourne, Sydney, Brisbane, and Adelaide. The Australian Bureau of Meteorology issued a severe storm warning for March 23. Conditions are easing on March 24 (Kp 3–4) but some aurora activity may continue. March is historically the best month for auroras due to the equinox effect, and with Solar Cycle 25 at its peak, scientists say this could be the best aurora viewing period until the mid-2030s. Aurora forecast: https://earthsky.org/sun/sun-news-activity-solar-flare-cme-aurora-updates/ Aurora Australis guide: https://www.elle.com.au/culture/news/aurora-australis-southern-lights-march-2026-tonight-alert/ Story 3: JWST Finds 'Impossible' Atmosphere on Lava World TOI-561 b A Carnegie Institution-led team used NASA's James Webb Space Telescope to detect the strongest evidence yet for an atmosphere around a rocky exoplanet. TOI-561 b — an ultra-hot super-Earth about twice Earth's mass, orbiting its star every 10.56 hours — was expected to be a bare rock. Instead, JWST measured a dayside temperature far cooler than a bare rock would produce, indicating a thick atmosphere redistributing heat above a global magma ocean. The findings were published in The Astrophysical Journal Letters. Source: Carnegie Institution for Science — https://carnegiescience.edu/ultra-hot-lava-world-has-thick-atmosphere-upending-expectations ScienceDaily: https://www.sciencedaily.com/releases/2026/03/260322020255.htm Story 4: Sealed Apollo 17 Moon Rocks Reveal Surprise Sulfur Signal Sealed lunar samples from Apollo 17 (collected 1972, opened through NASA's ANGSA program) have revealed unexpected sulfur isotope signatures. A Brown University-led team found volcanic material from the Taurus-Littrow region is strongly depleted in sulfur-33 — unlike anything found on Earth. Possible explanations include ancient lunar atmospheric chemistry or a legacy of the Theia impact that formed the Moon. Published in the Journal of Geophysical Research: Planets. Source: Brown University — https://www.brown.edu/news/2025-10-06/sulfur-isotopes-apollo-samples SciTechDaily: https://scitechdaily.com/scientists-open-moon-rocks-locked-away-since-1972-and-find-something-totally-unexpected/ Story 5: This Week in Global Rocketry An exceptional week of launches spanning five countries and seven rocket types: SpaceX Falcon 9 (Starlink 17-17, Tuesday; Starlink 10-44, Thursday — B1067's record 34th flight; Transporter 16, Sunday), Rocket Lab Electron (ESA Celeste demo sats, Wednesday, NZ), Isar Aerospace Spectrum (Onward and Upward, Wednesday, Norway), Chang Zheng 2C (Wednesday, China), CAS Space Kinetica 1 (Friday, China), Russia's debut Soyuz-5 (Friday, Baikonur), and ULA Atlas V (Amazon Leo batch, Sunday). The 73rd orbital launch attempt of 2026 worldwide. Full preview: https://www.nasaspaceflight.com/2026/03/launch-preview-032326/ Update: Progress MS-33 & Spectrum Rocket Progress MS-33 (also known as Progress 94) launched from the newly-repaired Site 31/6 at Baikonur on March 22 carrying 2,509 kg of supplies for the ISS Expedition 74 crew. A KURS antenna failure required ISS commander Sergei Kud-Sverchkov to dock the vehicle manually using the TORU backup system, scheduled for 13:34 UTC on March 24. Separately, Isar Aerospace's Spectrum rocket remains on the pad at Andøya, Norway, with a new launch window on March 25 (20:00–21:00 UTC) after weather delays. Progress MS-33: https://www.nasaspaceflight.com/2026/03/progress-ms33/ Spectrum launch info: https://isaraerospace.com/mission-updates-overview

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WEBVTT
Kind: captions
Language: en

00:00:00.400 --> 00:00:02.790
Good day, stargazers, and welcome back


00:00:02.800 --> 00:00:05.349
to Astronomy Daily. I'm Anna.


00:00:05.359 --> 00:00:07.670
>> And I'm Avery. And honestly, this might


00:00:07.680 --> 00:00:09.910
be our most packed episode of the season


00:00:09.920 --> 00:00:10.950
so far.


00:00:10.960 --> 00:00:13.669
>> Between a rocket still sitting on a pad


00:00:13.679 --> 00:00:15.910
in Norway waiting for its shot at


00:00:15.920 --> 00:00:18.390
history, a cargo ship that needed a


00:00:18.400 --> 00:00:21.429
human hand on the wheel, and an entirely


00:00:21.439 --> 00:00:23.670
different kind of skyhow happening over


00:00:23.680 --> 00:00:26.230
Australian cities last night, today


00:00:26.240 --> 00:00:28.710
really has it all. Plus, fresh science


00:00:28.720 --> 00:00:30.870
off the James Webb Space Telescope that


00:00:30.880 --> 00:00:33.030
has astronomers questioning everything


00:00:33.040 --> 00:00:34.630
they thought they knew about lava


00:00:34.640 --> 00:00:37.030
worlds. We've got news about sealed moon


00:00:37.040 --> 00:00:39.030
rocks finally giving up their secrets


00:00:39.040 --> 00:00:41.270
after 50 years. And we'll walk you


00:00:41.280 --> 00:00:42.869
through one of the busiest weeks in


00:00:42.879 --> 00:00:45.670
global rocketry in recent memory. And


00:00:45.680 --> 00:00:48.229
with less than 2 weeks to go until the


00:00:48.239 --> 00:00:50.950
most historic human space flight in half


00:00:50.960 --> 00:00:54.069
a century, the countdown to Aremis 2 is


00:00:54.079 --> 00:00:56.950
well and truly on. though not everyone


00:00:56.960 --> 00:00:58.470
agrees it should be.


00:00:58.480 --> 00:00:59.990
>> There's a scientist out there saying


00:01:00.000 --> 00:01:02.630
NASA should hold off. We'll get to that.


00:01:02.640 --> 00:01:05.189
>> Without further ado, then let's dive in.


00:01:05.199 --> 00:01:06.789
>> Let's start with the big one. As of


00:01:06.799 --> 00:01:08.950
today, NASA is officially targeting


00:01:08.960 --> 00:01:11.190
April 1st. And yes, we know how that


00:01:11.200 --> 00:01:13.670
sounds. As the launch date for Artemis


00:01:13.680 --> 00:01:16.469
2, the 6-day window runs April 1st


00:01:16.479 --> 00:01:19.190
through to the 6th. And just to be clear


00:01:19.200 --> 00:01:21.670
for anyone just joining us on the show,


00:01:21.680 --> 00:01:24.630
Artemis 2 is the first time human beings


00:01:24.640 --> 00:01:26.789
will travel to the vicinity of the moon


00:01:26.799 --> 00:01:31.749
since Apollo 17 in December 1972,


00:01:31.759 --> 00:01:35.190
over 50 years. This is genuinely


00:01:35.200 --> 00:01:36.310
historic.


00:01:36.320 --> 00:01:38.069
>> Four astronauts aboard the Orion


00:01:38.079 --> 00:01:40.310
spacecraft launched on the space launch


00:01:40.320 --> 00:01:43.270
system or SLS from Kennedy Space Center


00:01:43.280 --> 00:01:45.510
in Florida. The crew is commander Reed


00:01:45.520 --> 00:01:48.069
Weisman, pilot Victor Glover, mission


00:01:48.079 --> 00:01:50.389
specialist Christina Coach, and Canadian


00:01:50.399 --> 00:01:53.270
Space Agency astronaut Jeremy Hansen.


00:01:53.280 --> 00:01:55.270
>> Victor Glover will become the first


00:01:55.280 --> 00:01:57.749
person of color to travel beyond Earth


00:01:57.759 --> 00:02:00.310
orbit. Christina Coach will be the first


00:02:00.320 --> 00:02:02.789
woman, and Jeremy Hansen will be the


00:02:02.799 --> 00:02:05.749
first non-American citizen to leave low


00:02:05.759 --> 00:02:08.790
Earth orbit. This mission is full of


00:02:08.800 --> 00:02:11.350
firsts. The crew entered quarantine at


00:02:11.360 --> 00:02:13.670
Johnson Space Center in Houston on March


00:02:13.680 --> 00:02:15.990
18th, and they traveled down to Florida


00:02:16.000 --> 00:02:18.630
on March 27th. From there, it's really


00:02:18.640 --> 00:02:20.790
just a matter of weather systems, and


00:02:20.800 --> 00:02:21.990
that launch window.


00:02:22.000 --> 00:02:24.630
>> Now, the road to get here has had its


00:02:24.640 --> 00:02:27.750
bumps. There were liquid hydrogen leaks,


00:02:27.760 --> 00:02:30.150
helium flow issue that caused a roll


00:02:30.160 --> 00:02:31.990
back to the vehicle assembly building


00:02:32.000 --> 00:02:34.390
just last month. Engineers found a


00:02:34.400 --> 00:02:36.630
blocked seal in a cable connecting the


00:02:36.640 --> 00:02:38.949
rocket to the ground systems. That's


00:02:38.959 --> 00:02:41.670
fixed now. A successful wet dress


00:02:41.680 --> 00:02:43.910
rehearsal in late February cleared the


00:02:43.920 --> 00:02:44.309
way.


00:02:44.319 --> 00:02:46.070
>> And the mission itself, once it


00:02:46.080 --> 00:02:48.630
launches, will be a 10day free return


00:02:48.640 --> 00:02:50.710
trajectory around the moon. They'll


00:02:50.720 --> 00:02:53.270
swing out to about 5,000 m beyond the


00:02:53.280 --> 00:02:55.589
lunar surface, giving the crew and the


00:02:55.599 --> 00:02:58.070
world a view of the moon that no human


00:02:58.080 --> 00:03:00.790
has had since Jean Cernin and Harrison


00:03:00.800 --> 00:03:02.550
Schmidt were there in person.


00:03:02.560 --> 00:03:04.630
>> Now, Avery, you mentioned earlier that


00:03:04.640 --> 00:03:06.470
not everyone thinks this is the right


00:03:06.480 --> 00:03:09.190
moment to go. Yeah, this is a genuinely


00:03:09.200 --> 00:03:11.350
interesting wrinkle. A researcher at


00:03:11.360 --> 00:03:13.750
Mexico's National Autonomous University,


00:03:13.760 --> 00:03:16.550
Victor Velasco Era, has published a new


00:03:16.560 --> 00:03:18.309
analysis suggesting that we are


00:03:18.319 --> 00:03:20.869
currently in a window of elevated solar


00:03:20.879 --> 00:03:23.430
superflare risk. His models point to a


00:03:23.440 --> 00:03:25.589
high activity period running from mid


00:03:25.599 --> 00:03:29.430
2025 through to mid 2026, focus on the


00:03:29.440 --> 00:03:31.350
sun's southern hemisphere. He's


00:03:31.360 --> 00:03:33.190
recommending NASA delay the mission


00:03:33.200 --> 00:03:35.030
until the second half of this year at


00:03:35.040 --> 00:03:37.589
the earliest. And you can see why he'd


00:03:37.599 --> 00:03:40.550
be concerned. We've had a G3 geomagnetic


00:03:40.560 --> 00:03:42.390
storm this week, which we're going to


00:03:42.400 --> 00:03:45.190
get to in a moment. The sun is extremely


00:03:45.200 --> 00:03:46.470
active right now.


00:03:46.480 --> 00:03:48.630
>> Right. Though NASA has assessed the


00:03:48.640 --> 00:03:50.789
risks and all teams pulled go for


00:03:50.799 --> 00:03:52.949
launch. Lorie Glaze from NASA's


00:03:52.959 --> 00:03:55.110
exploration systems directorate said,


00:03:55.120 --> 00:03:57.509
and I'm paraphrasing, that an incredible


00:03:57.519 --> 00:03:59.429
amount of work has gone into preparing


00:03:59.439 --> 00:04:01.750
for this, and they've had very open,


00:04:01.760 --> 00:04:03.509
transparent discussions about risk


00:04:03.519 --> 00:04:06.550
posture and mitigation. So, the mission


00:04:06.560 --> 00:04:09.589
is proceeding, but it does add a certain


00:04:09.599 --> 00:04:12.070
tension to an already extraordinary


00:04:12.080 --> 00:04:14.550
story, doesn't it? The sun is at the


00:04:14.560 --> 00:04:17.189
peak of its 11-year cycle. We're heading


00:04:17.199 --> 00:04:19.430
back to the moon, and a scientist is


00:04:19.440 --> 00:04:21.670
saying, "Are you sure you want to do


00:04:21.680 --> 00:04:22.710
this now?"


00:04:22.720 --> 00:04:25.590
>> Humanity doing bold things anyway. Feels


00:04:25.600 --> 00:04:28.150
on brand, honestly.


00:04:28.160 --> 00:04:29.909
>> We'll have everything you need to watch


00:04:29.919 --> 00:04:32.070
the launch live in our show notes.


00:04:32.080 --> 00:04:34.870
Fingers crossed for April the 1st. Okay,


00:04:34.880 --> 00:04:36.950
so speaking of the sun, let's talk about


00:04:36.960 --> 00:04:38.950
what it's been doing to our skies this


00:04:38.960 --> 00:04:41.909
week because it has been spectacular.


00:04:41.919 --> 00:04:44.790
>> A series of coronal mass ejections or


00:04:44.800 --> 00:04:48.310
CMEs that left the sun on March 16th and


00:04:48.320 --> 00:04:51.270
18th arrived at Earth around the equinox


00:04:51.280 --> 00:04:53.830
and they drove geomagnetic storming to


00:04:53.840 --> 00:04:56.550
G3 levels on the Noah scale. That's


00:04:56.560 --> 00:04:58.469
classified as strong.


00:04:58.479 --> 00:05:00.870
>> And the result were auroras visible from


00:05:00.880 --> 00:05:03.350
an extraordinary range of latitudes.


00:05:03.360 --> 00:05:05.430
We're talking reports of vivid displays


00:05:05.440 --> 00:05:08.629
from New York, London, Northern France,


00:05:08.639 --> 00:05:11.189
even parts of Scotland lit up. And when


00:05:11.199 --> 00:05:13.270
you see aurora reports from Scotland,


00:05:13.280 --> 00:05:14.950
you're already dealing with something


00:05:14.960 --> 00:05:15.909
significant.


00:05:15.919 --> 00:05:18.310
>> But the story closest to home for many


00:05:18.320 --> 00:05:21.430
of our listeners. The Aurora Arales was


00:05:21.440 --> 00:05:23.990
visible across major Australian cities


00:05:24.000 --> 00:05:26.469
last night. The Australian Bureau of


00:05:26.479 --> 00:05:29.670
Meteorology issued a severe geomagnetic


00:05:29.680 --> 00:05:31.909
storm warning and the southern lights


00:05:31.919 --> 00:05:34.230
were reported from Melbourne, Sydney,


00:05:34.240 --> 00:05:35.990
Brisbane, and Adelaide.


00:05:36.000 --> 00:05:38.710
>> That is remarkable. Sydney is not what


00:05:38.720 --> 00:05:40.629
you'd call a typical aurora viewing


00:05:40.639 --> 00:05:42.950
destination. If you were outside last


00:05:42.960 --> 00:05:44.950
night and happened to look south,


00:05:44.960 --> 00:05:46.710
especially from somewhere with a clear


00:05:46.720 --> 00:05:49.270
horizon, you may well have caught it.


00:05:49.280 --> 00:05:52.150
>> As of today, March 24th, conditions are


00:05:52.160 --> 00:05:55.350
easing. We're dropping back to KP 3 to


00:05:55.360 --> 00:05:58.469
4, unsettled to active with a slight


00:05:58.479 --> 00:06:01.189
chance of isolated G1 minor storm


00:06:01.199 --> 00:06:03.749
intervals. So, there may still be some


00:06:03.759 --> 00:06:06.070
activity tonight, but the peak has


00:06:06.080 --> 00:06:06.950
passed.


00:06:06.960 --> 00:06:09.189
>> Now, why is March such a good month for


00:06:09.199 --> 00:06:11.110
auroras? This is something a lot of


00:06:11.120 --> 00:06:12.390
people don't know.


00:06:12.400 --> 00:06:14.870
>> It's called the equinox effect. Around


00:06:14.880 --> 00:06:17.350
the March and September equinoxes, the


00:06:17.360 --> 00:06:19.510
geometry of Earth's magnetic field


00:06:19.520 --> 00:06:21.749
relative to the solar wind becomes


00:06:21.759 --> 00:06:24.469
particularly favorable. The field lines


00:06:24.479 --> 00:06:26.629
are better aligned to allow charged


00:06:26.639 --> 00:06:28.710
particles in, which means you can get


00:06:28.720 --> 00:06:31.270
strong auroral activity even from


00:06:31.280 --> 00:06:33.830
moderate solar events. Combined with the


00:06:33.840 --> 00:06:36.230
current solar maximum, the peak of solar


00:06:36.240 --> 00:06:38.790
cycle 25, and we're living through what


00:06:38.800 --> 00:06:40.950
could genuinely be the best aurora


00:06:40.960 --> 00:06:44.309
viewing period until the mid 2030s. So,


00:06:44.319 --> 00:06:45.909
if you've been meaning to chase the


00:06:45.919 --> 00:06:48.390
lights, the message from scientists is


00:06:48.400 --> 00:06:50.950
this is your window. The sun will start


00:06:50.960 --> 00:06:52.870
winding down from here, and the next


00:06:52.880 --> 00:06:55.749
solar maximum is over a decade away.


00:06:55.759 --> 00:06:57.990
>> We'll have Aurora forecast links in the


00:06:58.000 --> 00:06:59.830
show notes so you can track what tonight


00:06:59.840 --> 00:07:01.749
looks like from your location.


00:07:01.759 --> 00:07:03.589
>> I'm sure our producer, who lives in


00:07:03.599 --> 00:07:06.790
Sydney, will be out and looking up. Now,


00:07:06.800 --> 00:07:09.749
let's head into deep space and into one


00:07:09.759 --> 00:07:12.230
of the most genuinely surprising pieces


00:07:12.240 --> 00:07:14.469
of planetary science we've seen in a


00:07:14.479 --> 00:07:17.830
while. James Webb has done it again.


00:07:17.840 --> 00:07:19.830
>> I love a story where the headline is


00:07:19.840 --> 00:07:21.909
basically, "Scientists found something


00:07:21.919 --> 00:07:23.909
they were almost certain couldn't be


00:07:23.919 --> 00:07:24.710
there."


00:07:24.720 --> 00:07:28.390
>> So, the planet in question is called toi


00:07:28.400 --> 00:07:30.070
561b.


00:07:30.080 --> 00:07:32.469
It's a super Earth about twice the mass


00:07:32.479 --> 00:07:36.150
of our planet orbiting a star around 280


00:07:36.160 --> 00:07:39.029
lighty years away. And when we say close


00:07:39.039 --> 00:07:42.309
to its star, we mean absurdly, almost


00:07:42.319 --> 00:07:44.790
comically close. It completes a full


00:07:44.800 --> 00:07:48.710
orbit in just 10.56 hours. A year on


00:07:48.720 --> 00:07:50.629
this world is shorter than the average


00:07:50.639 --> 00:07:51.589
working day.


00:07:51.599 --> 00:07:54.550
>> It orbits at 140th the distance that


00:07:54.560 --> 00:07:57.430
Mercury sits from our sun. The dayside


00:07:57.440 --> 00:08:00.550
is in permanent unrelenting sunlight.


00:08:00.560 --> 00:08:03.589
The planet is likely tidily locked. Same


00:08:03.599 --> 00:08:06.790
face always towards the star. Same face


00:08:06.800 --> 00:08:09.270
always in darkness. The surface is


00:08:09.280 --> 00:08:11.670
thought to be a global ocean of molten


00:08:11.680 --> 00:08:14.390
rock. And under those conditions,


00:08:14.400 --> 00:08:17.830
extreme radiation, extreme heat, extreme


00:08:17.840 --> 00:08:20.309
proximity to the star, the scientific


00:08:20.319 --> 00:08:22.710
consensus was that any atmosphere this


00:08:22.720 --> 00:08:24.710
planet might have once had would have


00:08:24.720 --> 00:08:27.270
been stripped away long ago. It should


00:08:27.280 --> 00:08:31.830
be a bare airless rock. Except it isn't.


00:08:31.840 --> 00:08:34.389
The Carnegie Institution's le team used


00:08:34.399 --> 00:08:37.029
Web's near infrared spectroscope,


00:08:37.039 --> 00:08:39.110
Nearspec, to take the planet's


00:08:39.120 --> 00:08:41.110
temperature by measuring how much light


00:08:41.120 --> 00:08:44.870
the system emitted when TOI561B


00:08:44.880 --> 00:08:47.670
passed behind its star. If it were a


00:08:47.680 --> 00:08:49.990
bare rock, the dayside should reach


00:08:50.000 --> 00:08:52.710
something close to 4,900°


00:08:52.720 --> 00:08:57.350
F, around 2700 C. Instead, they measured


00:08:57.360 --> 00:09:02.790
around 3,200° F or 1,800 C. Still


00:09:02.800 --> 00:09:05.430
extraordinarily hot, but significantly


00:09:05.440 --> 00:09:07.509
cooler than expected. And the only


00:09:07.519 --> 00:09:09.430
explanation that fits the data is that


00:09:09.440 --> 00:09:11.269
there's an atmosphere up there,


00:09:11.279 --> 00:09:13.509
redistributing heat from the dayside to


00:09:13.519 --> 00:09:14.710
the night side.


00:09:14.720 --> 00:09:17.269
>> The lead researcher, Johanna Tesca at


00:09:17.279 --> 00:09:19.590
Carnegie Science, described the planet


00:09:19.600 --> 00:09:22.310
as, and this is a direct quote, really


00:09:22.320 --> 00:09:25.269
like a wet lava ball. The idea is that


00:09:25.279 --> 00:09:27.269
there's a feedback loop happening.


00:09:27.279 --> 00:09:29.590
Volatile gases bubble up from the magma


00:09:29.600 --> 00:09:31.590
ocean into the atmosphere while the


00:09:31.600 --> 00:09:34.070
magma ocean simultaneously pulls some


00:09:34.080 --> 00:09:36.389
gases back in. It's a strange


00:09:36.399 --> 00:09:38.389
equilibrium. What makes this


00:09:38.399 --> 00:09:40.310
scientifically significant beyond the


00:09:40.320 --> 00:09:42.550
wow factor is what it tells us about


00:09:42.560 --> 00:09:45.110
rocky planet evolution. We've assumed


00:09:45.120 --> 00:09:47.430
for a long time that small, hot,


00:09:47.440 --> 00:09:50.389
close-in worlds can't hold atmospheres.


00:09:50.399 --> 00:09:53.990
POI 561B suggests the reality is more


00:09:54.000 --> 00:09:56.070
complicated and potentially more


00:09:56.080 --> 00:09:57.110
interesting.


00:09:57.120 --> 00:09:59.269
>> The team is now analyzing the full data


00:09:59.279 --> 00:10:01.269
set to map temperature patterns all the


00:10:01.279 --> 00:10:03.110
way around the planet and try to narrow


00:10:03.120 --> 00:10:04.870
down what the atmosphere is actually


00:10:04.880 --> 00:10:07.910
made of. Water vapor, carbon dioxide,


00:10:07.920 --> 00:10:10.630
silicate clouds, all on the table.


00:10:10.640 --> 00:10:13.750
>> One of JWST's core missions is finding


00:10:13.760 --> 00:10:16.150
atmospheres around rocky worlds. Because


00:10:16.160 --> 00:10:18.550
as far as we know, an atmosphere is a


00:10:18.560 --> 00:10:22.389
prerequisite for life. POI 561b is


00:10:22.399 --> 00:10:24.310
certainly not habitable in any


00:10:24.320 --> 00:10:26.470
conventional sense. But understanding


00:10:26.480 --> 00:10:28.870
how a world this extreme holds onto its


00:10:28.880 --> 00:10:31.030
air could tell us a great deal about


00:10:31.040 --> 00:10:33.350
rocky planets that are far more


00:10:33.360 --> 00:10:35.829
temperate. There's something genuinely


00:10:35.839 --> 00:10:38.470
poetic about today's next story. We're


00:10:38.480 --> 00:10:41.670
going back to December 1972, the last


00:10:41.680 --> 00:10:43.829
time humans walked on the moon, and


00:10:43.839 --> 00:10:45.269
discovering that some of what they


00:10:45.279 --> 00:10:47.910
brought home has been quietly waiting 50


00:10:47.920 --> 00:10:50.550
years to tell us something unexpected.


00:10:50.560 --> 00:10:52.710
>> The Apollo Next Generation Sample


00:10:52.720 --> 00:10:55.509
Analysis Program, or ANXA, was set up


00:10:55.519 --> 00:10:57.670
specifically for this purpose. When the


00:10:57.680 --> 00:10:59.509
Apollo astronauts returned from the


00:10:59.519 --> 00:11:01.910
moon, NASA deliberately sealed some of


00:11:01.920 --> 00:11:04.069
the samples and set them aside, knowing


00:11:04.079 --> 00:11:06.230
that future scientists with better tools


00:11:06.240 --> 00:11:08.470
would be able to extract more from them


00:11:08.480 --> 00:11:10.949
than the technology of the 1970s ever


00:11:10.959 --> 00:11:11.750
could.


00:11:11.760 --> 00:11:13.910
>> And that moment has now arrived for a


00:11:13.920 --> 00:11:15.990
double drive tube pushed into the lunar


00:11:16.000 --> 00:11:18.550
surface at the Taurus litau region by


00:11:18.560 --> 00:11:20.870
Jean Cernin and Harrison Schmidt during


00:11:20.880 --> 00:11:24.470
Apollo 17. A team led by James Den at


00:11:24.480 --> 00:11:27.030
Brown University used a technique called


00:11:27.040 --> 00:11:29.590
secondary ion mass spectrometry to


00:11:29.600 --> 00:11:31.990
measure sulfur isotopes. And what they


00:11:32.000 --> 00:11:34.470
found was not what anyone expected.


00:11:34.480 --> 00:11:36.870
>> So for context, Earth and the moon have


00:11:36.880 --> 00:11:39.190
remarkably similar oxygen isotope


00:11:39.200 --> 00:11:41.590
signatures. Scientists have long assumed


00:11:41.600 --> 00:11:43.269
that sulfur would follow the same


00:11:43.279 --> 00:11:45.590
pattern, that the moon's interior would


00:11:45.600 --> 00:11:47.590
look chemically similar to Earth's in


00:11:47.600 --> 00:11:50.150
this regard. Dotton's team expected to


00:11:50.160 --> 00:11:51.990
confirm that assumption.


00:11:52.000 --> 00:11:54.389
>> Instead, the volcanic material in the


00:11:54.399 --> 00:11:56.870
sample is strongly depleted in sulfur


00:11:56.880 --> 00:12:00.389
33, one of four stable sulfur isotopes.


00:12:00.399 --> 00:12:03.110
The values are, in Dotton's own words,


00:12:03.120 --> 00:12:05.030
very different from anything we find on


00:12:05.040 --> 00:12:07.030
Earth. He said he simply wasn't


00:12:07.040 --> 00:12:08.310
expecting that.


00:12:08.320 --> 00:12:10.389
>> So, what does it mean? There are two


00:12:10.399 --> 00:12:12.710
leading explanations and neither is


00:12:12.720 --> 00:12:14.870
boring. The first is that this is


00:12:14.880 --> 00:12:17.430
evidence of very ancient chemistry.


00:12:17.440 --> 00:12:19.590
sulfur that interacted with ultraviolet


00:12:19.600 --> 00:12:22.389
light in an early thin lunar atmosphere


00:12:22.399 --> 00:12:24.710
billions of years ago. The implication


00:12:24.720 --> 00:12:26.790
there would be that material somehow


00:12:26.800 --> 00:12:29.110
cycled from the lunar surface into the


00:12:29.120 --> 00:12:32.069
mantle, a kind of protoplate tectonics


00:12:32.079 --> 00:12:34.230
on a world we don't think has ever had


00:12:34.240 --> 00:12:35.670
plate tectonics.


00:12:35.680 --> 00:12:37.750
>> The second explanation reaches even


00:12:37.760 --> 00:12:39.829
further back. The leading theory of the


00:12:39.839 --> 00:12:42.230
moon's origin is the giant impact. A


00:12:42.240 --> 00:12:44.470
Mars-sized body called Thea collided


00:12:44.480 --> 00:12:46.629
with the early Earth, and the debris


00:12:46.639 --> 00:12:49.190
eventually coalesed into the moon. If


00:12:49.200 --> 00:12:51.030
Thea had a very different sulfur


00:12:51.040 --> 00:12:53.190
composition from Earth, that signature


00:12:53.200 --> 00:12:54.949
might still be locked inside the lunar


00:12:54.959 --> 00:12:57.190
mantle today. A fingerprint from a


00:12:57.200 --> 00:12:59.910
collision that happened 4 billion years


00:12:59.920 --> 00:13:00.710
ago.


00:13:00.720 --> 00:13:03.110
>> The data doesn't currently favor one


00:13:03.120 --> 00:13:05.590
explanation over the other. Dottton is


00:13:05.600 --> 00:13:07.350
hoping that comparisons with samples


00:13:07.360 --> 00:13:09.590
from Mars and other planetary bodies


00:13:09.600 --> 00:13:11.750
will help resolve it. But the broader


00:13:11.760 --> 00:13:14.150
message is clear. These samples are


00:13:14.160 --> 00:13:17.269
still yielding genuine surprises decades


00:13:17.279 --> 00:13:19.350
after they were collected. And there are


00:13:19.360 --> 00:13:21.750
more sealed Apollo containers still to


00:13:21.760 --> 00:13:22.790
be opened.


00:13:22.800 --> 00:13:24.550
>> There is something remarkable about the


00:13:24.560 --> 00:13:26.310
fact that astronauts who have been gone


00:13:26.320 --> 00:13:29.110
for over 50 years are still in a very


00:13:29.120 --> 00:13:31.030
real sense contributing to our


00:13:31.040 --> 00:13:33.269
understanding of the solar system. All


00:13:33.279 --> 00:13:35.670
right, let's do a lap of the launchpads


00:13:35.680 --> 00:13:37.590
because this week is genuinely


00:13:37.600 --> 00:13:39.190
exceptional for space activity


00:13:39.200 --> 00:13:42.150
worldwide. NASA spaceflight.com


00:13:42.160 --> 00:13:44.230
published their weekly preview and


00:13:44.240 --> 00:13:46.389
honestly it reads like a greatest hits


00:13:46.399 --> 00:13:48.629
of the current space age. Let's start


00:13:48.639 --> 00:13:51.110
with what's already happened. SpaceX


00:13:51.120 --> 00:13:52.790
kicked off the week with the Falcon 9


00:13:52.800 --> 00:13:54.710
launch from Vandenberg in California


00:13:54.720 --> 00:13:57.590
today, Tuesday, carrying 25 Starling


00:13:57.600 --> 00:13:59.910
satellites to sun-synchronous orbit.


00:13:59.920 --> 00:14:03.990
Booster B1081 flying for the 23rd time.


00:14:04.000 --> 00:14:05.670
Routine at this point, but still


00:14:05.680 --> 00:14:07.670
remarkable when you say it out loud.


00:14:07.680 --> 00:14:09.910
>> Tomorrow, Wednesday, is arguably the


00:14:09.920 --> 00:14:12.389
biggest single day in the schedule. ESAR


00:14:12.399 --> 00:14:14.470
Aerospace's Spectrum rocket has its


00:14:14.480 --> 00:14:17.509
window at 8:00 p.m. UTC from Endoa in


00:14:17.519 --> 00:14:19.350
Norway. We'll talk about that more in


00:14:19.360 --> 00:14:22.389
the update segment. And at 9:14 a.m.


00:14:22.399 --> 00:14:25.430
UTC, Rocket Labs Electron launches from


00:14:25.440 --> 00:14:28.069
New Zealand's Mahia Peninsula, carrying


00:14:28.079 --> 00:14:30.949
two ESA Celeste satellites. Those are


00:14:30.959 --> 00:14:33.030
the first of 10 planned navigation


00:14:33.040 --> 00:14:35.189
demonstration satellites that will test


00:14:35.199 --> 00:14:37.189
positioning technology in low Earth


00:14:37.199 --> 00:14:37.910
orbit.


00:14:37.920 --> 00:14:40.629
>> Also Wednesday, China launches a Chang


00:14:40.639 --> 00:14:44.550
Zang 2C from Taiwan, payload classified,


00:14:44.560 --> 00:14:47.350
which will be that rocket's 87th mission


00:14:47.360 --> 00:14:51.430
overall. The CZ2C has been flying since


00:14:51.440 --> 00:14:52.949
1982,


00:14:52.959 --> 00:14:54.389
which puts it in some pretty


00:14:54.399 --> 00:14:55.750
distinguished company.


00:14:55.760 --> 00:14:58.069
>> Thursday brings another Falcon 9 from


00:14:58.079 --> 00:15:00.629
Cape Canaveral carrying 29 Starling


00:15:00.639 --> 00:15:02.790
satellites. And this one has a record


00:15:02.800 --> 00:15:06.310
attached. Booster B1067 will be making


00:15:06.320 --> 00:15:09.030
its 34th flight, setting a new record


00:15:09.040 --> 00:15:11.910
for Falcon 9 booster reuse. This rocket


00:15:11.920 --> 00:15:14.870
first flew in June 2021 on a cargo


00:15:14.880 --> 00:15:16.710
resupply mission to the International


00:15:16.720 --> 00:15:19.110
Space Station. It's now flying for the


00:15:19.120 --> 00:15:22.389
34th time. SpaceX has fundamentally


00:15:22.399 --> 00:15:24.870
changed what reusability means.


00:15:24.880 --> 00:15:27.350
>> Friday is enormous. China's commercial


00:15:27.360 --> 00:15:29.670
launch company CAS Space flies its


00:15:29.680 --> 00:15:32.470
Kinetic 1 solid rocket from Juan with an


00:15:32.480 --> 00:15:35.030
undisclosed payload. And Rosscosmos


00:15:35.040 --> 00:15:36.949
launches the first ever flight of the


00:15:36.959 --> 00:15:39.990
Soyuse 5 rocket from Biconor, also


00:15:40.000 --> 00:15:42.790
called. This rocket is Russia's long-


00:15:42.800 --> 00:15:45.110
aaited replacement for the Zenit family.


00:15:45.120 --> 00:15:46.949
It carries a mass simulator on this


00:15:46.959 --> 00:15:49.189
debut flight, launching from a pad that


00:15:49.199 --> 00:15:51.269
hasn't seen an orbital launch since


00:15:51.279 --> 00:15:54.069
2017. Big moment for Russian launch


00:15:54.079 --> 00:15:55.430
vehicle development.


00:15:55.440 --> 00:15:57.910
>> And the week closes out on Sunday with


00:15:57.920 --> 00:16:01.910
two more. ULA's Atlas V5 launching 29


00:16:01.920 --> 00:16:03.670
Amazon LEO satellites from Cape


00:16:03.680 --> 00:16:06.470
Canaveral in its powerful 551


00:16:06.480 --> 00:16:08.870
configuration. That's five solid rocket


00:16:08.880 --> 00:16:11.350
boosters for what will be that rocket's


00:16:11.360 --> 00:16:14.629
107th overall mission. And SpaceX wraps


00:16:14.639 --> 00:16:17.269
things up with Transporter 16, a ride


00:16:17.279 --> 00:16:19.430
share mission from Vandenberg carrying


00:16:19.440 --> 00:16:21.910
dozens of small satellites. That will be


00:16:21.920 --> 00:16:25.590
SpaceX's 40th Falcon 9 launch of 2026


00:16:25.600 --> 00:16:28.310
alone and the 73rd orbital launch


00:16:28.320 --> 00:16:31.670
attempt worldwide this year. So, five


00:16:31.680 --> 00:16:34.470
countries, six different rockets, Falcon


00:16:34.480 --> 00:16:39.030
9, Electron, Spectrum, CZ2C, Kinetica 1,


00:16:39.040 --> 00:16:42.389
Soyuse 5, Atlas V5, launching from


00:16:42.399 --> 00:16:44.629
California, Florida, New Zealand,


00:16:44.639 --> 00:16:46.870
Norway, two sites in China, and


00:16:46.880 --> 00:16:49.670
Kazakhstan in one week.


00:16:49.680 --> 00:16:52.790
>> The age of routine space flight is here.


00:16:52.800 --> 00:16:54.710
It's just also occasionally


00:16:54.720 --> 00:16:57.189
extraordinary. Before we wrap, a quick


00:16:57.199 --> 00:16:58.870
followup on two stories we covered


00:16:58.880 --> 00:17:00.550
yesterday because both have had


00:17:00.560 --> 00:17:02.790
developments today. Let's start with the


00:17:02.800 --> 00:17:05.189
ISS. You'll remember that Russia


00:17:05.199 --> 00:17:08.549
launched the Progress MS33 cargo ship,


00:17:08.559 --> 00:17:11.829
also called Progress 94 on Sunday from


00:17:11.839 --> 00:17:14.789
the Biconor Cosmodrome, carrying about 2


00:17:14.799 --> 00:17:17.829
and 1/2 tons of supplies for the 7person


00:17:17.839 --> 00:17:22.069
Expedition 74 crew. Food, fuel, water,


00:17:22.079 --> 00:17:24.870
oxygen, the good stuff. But there was a


00:17:24.880 --> 00:17:27.189
complication. Shortly after launch, one


00:17:27.199 --> 00:17:29.430
of the spacecraft's two KURS automated


00:17:29.440 --> 00:17:31.830
docking antennas failed to deploy. The


00:17:31.840 --> 00:17:34.150
KUR system is the normal hands-off


00:17:34.160 --> 00:17:37.110
approach. The ship guides itself in with


00:17:37.120 --> 00:17:38.710
only one antenna working. Full


00:17:38.720 --> 00:17:40.630
automation wasn't available.


00:17:40.640 --> 00:17:43.590
>> So this morning, ISS Commander Sergey


00:17:43.600 --> 00:17:47.669
Kudkov took over manually using the Tou


00:17:47.679 --> 00:17:49.830
system. That's the Telerobotically


00:17:49.840 --> 00:17:52.310
operated rendevous system, a control


00:17:52.320 --> 00:17:55.190
panel inside the Zvezda service module.


00:17:55.200 --> 00:17:58.070
The spacecraft flew itself to within 200


00:17:58.080 --> 00:18:00.710
m of the station and from there Cuds


00:18:00.720 --> 00:18:03.270
Ferkov guided it in. Docking was


00:18:03.280 --> 00:18:06.390
scheduled for 9:34 Eastern time. Ross


00:18:06.400 --> 00:18:07.990
Cosmos were quick to point out that


00:18:08.000 --> 00:18:09.990
manual approaches are routinely


00:18:10.000 --> 00:18:12.310
practiced during Cosmo training. This


00:18:12.320 --> 00:18:14.630
was a contingency, not a crisis. And


00:18:14.640 --> 00:18:16.310
there's a second layer to the story


00:18:16.320 --> 00:18:18.710
worth noting. This was the first launch


00:18:18.720 --> 00:18:21.510
from site 31 at Biconor since that pad


00:18:21.520 --> 00:18:23.990
was damaged during the Soyuse MS28


00:18:24.000 --> 00:18:26.230
launch last November when part of the


00:18:26.240 --> 00:18:28.549
launch infrastructure collapsed. That


00:18:28.559 --> 00:18:30.710
pad is Russia's only one capable of


00:18:30.720 --> 00:18:32.710
sending crude missions and cargo ships


00:18:32.720 --> 00:18:35.669
to the ISS. Its return to service is


00:18:35.679 --> 00:18:37.270
genuinely significant.


00:18:37.280 --> 00:18:39.750
>> We'll keep watching and with any luck,


00:18:39.760 --> 00:18:42.390
Progress 94 is safely birthed at the


00:18:42.400 --> 00:18:45.110
Pois module as you listen to this. And


00:18:45.120 --> 00:18:47.430
on the other story we promised to follow


00:18:47.440 --> 00:18:49.830
Isar Aerospace's Spectrum rocket is


00:18:49.840 --> 00:18:52.549
still on the pad. Weather Andoya pushed


00:18:52.559 --> 00:18:54.230
the attempt from Sunday then from


00:18:54.240 --> 00:18:56.310
yesterday. The current window is


00:18:56.320 --> 00:18:58.710
Wednesday night 8:00 p.m. to 900 p.m.


00:18:58.720 --> 00:19:01.110
UTC. We'll have an update in tomorrow's


00:19:01.120 --> 00:19:01.750
episode.


00:19:01.760 --> 00:19:03.909
>> If it succeeds, it will be the first


00:19:03.919 --> 00:19:06.310
time a rocket designed, built, and


00:19:06.320 --> 00:19:08.710
launched from continental European soil


00:19:08.720 --> 00:19:11.590
has reached orbit. That is a headline we


00:19:11.600 --> 00:19:13.590
very much want to be able to read.


00:19:13.600 --> 00:19:15.669
Fingers crossed for ISAR and the whole


00:19:15.679 --> 00:19:17.510
European space industry.


00:19:17.520 --> 00:19:19.430
>> Again, we'll update any new developments


00:19:19.440 --> 00:19:20.789
in tomorrow's show.


00:19:20.799 --> 00:19:22.870
>> That is your Astronomy Daily for


00:19:22.880 --> 00:19:25.830
Tuesday, March 24th. We've got a lot of


00:19:25.840 --> 00:19:28.310
threads in the air right now. Artemis 2


00:19:28.320 --> 00:19:30.789
approaching its launch window. Spectrum


00:19:30.799 --> 00:19:32.870
waiting for the weather. A sun that


00:19:32.880 --> 00:19:35.110
doesn't want to sit still. So, it's a


00:19:35.120 --> 00:19:36.549
great time to make sure you're


00:19:36.559 --> 00:19:38.150
subscribed wherever you get your


00:19:38.160 --> 00:19:40.630
podcast. All the sources, links, and


00:19:40.640 --> 00:19:42.310
reading for today's stories are in the


00:19:42.320 --> 00:19:44.310
show notes. And if today's episode


00:19:44.320 --> 00:19:46.549
sparks something for you, whether it's


00:19:46.559 --> 00:19:48.549
aurora chasing or thinking about those


00:19:48.559 --> 00:19:51.350
Apollo samples or just looking up at the


00:19:51.360 --> 00:19:53.110
moon tonight and doing the maths on


00:19:53.120 --> 00:19:55.590
April 1st, we'd love to hear from you.


00:19:55.600 --> 00:19:57.830
>> Find us on Twitter and Instagram at


00:19:57.840 --> 00:20:01.110
Astro Daily Pod and on Tik Tok, X,


00:20:01.120 --> 00:20:03.510
YouTube, and Tumblr at the same handle.


00:20:03.520 --> 00:20:06.470
The website is astronomyaily.io.


00:20:06.480 --> 00:20:07.990
And we're proud to be part of the


00:20:08.000 --> 00:20:10.310
byes.com podcast network


00:20:10.320 --> 00:20:12.950
>> for Anna. I'm Avery. Keep looking up


00:20:12.960 --> 00:20:14.710
>> and we'll see you tomorrow.


00:20:14.720 --> 00:20:17.750
>> Astronomy day.


00:20:17.760 --> 00:20:21.559
Stories we told.