Artemis II safely splashes down
264 points by areoform 2 hours ago | 79 comments

brianjlogan 4 minutes ago
As an American I feel like I've been going through a bit of an identity crisis from what I remember growing up.

Probably the rose tinted glasses of being a child but being from Florida I always had a sense of amazement and wonder as I heard the sonic boom of the shuttle returning to earth.

Really felt like I was coexisting in this incredible scientific powerhouse of a country full of bright and enabled peoples that knew how to prioritize curiosity and innovation.

Feeling like a bit of a "vibe" post which is everything wrong lately but I can't help but feel some satisfaction that we're still able to accomplish something like this in our space endeavors.

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llbbdd 34 seconds ago
I think especially online there's a lot of emphasis on "everything is wrong". A mission like this is hard to ignore and highlights the bias. On the whole, despite setbacks, we continue.
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areoform 58 minutes ago
Glad that they're safe and sound.

It's worth pointing out that this is the first extremely public, widely acknowledged high risk mission NASA has done in over 50 years. The Shuttle was risky, but it wasn't thought of or acknowledged by NASA as being risky until very late in its lifecycle.

According to NASA's OIG, Artemis acceptable crew mortality rate is 1 in 30. Roughly 3x riskier than the shuttle. There genuinely is a world where they don't make it back home.

I am grateful that they did. And I'm grateful that we're going to go even further. I can't wait to see what Jared's cooking up (for those who don't know, he made his own version of the Gemini program in Polaris and funded it out of pocket).

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irjustin 23 minutes ago
> Artemis acceptable crew mortality rate is 1 in 30.

This seems insane to me. That X decades later we accept, with all our advancements in tech, a weaker system than ever before. That if we send 30 people we _accept_ that one is possible to die.

That's the starting point? That's what we document as acceptable?

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zhoujing204 6 minutes ago
"As of 1 April 2026, there have been five incidents in which a spacecraft in flight suffered crew fatalities, killing a total of 15 astronauts and 4 cosmonauts.[2][how?] Of these, two had reached the internationally recognized edge of space (100 km or 62mi above sea level) when or before the incident occurred, one had reached the U.S. definition of space at 266,000 ft, and one was planned to do so. In each of these accidents, the entire crew was killed. As of April 2026, a total of 791 people have flown into space and 19 of them have died in related incidents. This sets the current statistical fatality rate at 2.4 percent."

[wiki link](https://en.wikipedia.org/wiki/List_of_spaceflight-related_ac...).-,During%20spaceflight,fatality%20rate%20at%202.4%20percent.)

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areoform 8 minutes ago
Yes, and the memories of Apollo are made rosy by hagiography. I even wrote an entire thing to explain why, https://1517.substack.com/p/1-in-30-artemis-greatness-and-ri... (yeah, shameless plug, sorry - it's more for the citations than not. You can read the standards and reports I've linked to)

But if I'm allowed to repeat myself from elsewhere in the thread and the meat of the above thing,

It's physically not possible at our current level of technology to make this "safer" due to the distances and energies involved. Even with the Commercial Cargo and Crew Program (C3P), NASA has set the acceptable mortality threshold at 1 in 270 over the entire mission and 1 in 1000 on ascent / descent. If they could set it higher by gaming the math, they would. They can't.

We're a very primitive species, and the forces involved here are genuinely new. And no, Apollo wasn't much better either, at least 10 astronauts were killed in training or burned alive, as well as (far worse, because astronauts sign up for the risk) one member of ground staff.

People love to hate the Shuttle, and it ended up being subpar / fail expectations due to the political constraints NASA was under, but the Shuttle was a genuine advance for its time – a nonsensical, economically insane advance, but still an advance. If you look at the Shuttle alternative proposals / initial proposals as well as stuff like Dynasoar and Star Raker, you'll see NASA iterating through Starship style ideas. But those were rejected due to higher up front capital investment at the time.

The Shuttle is an odd franken-turduckling, because it was designed for one mission and one mission only. And that mission never happened. That cargo bay existed to capture certain Soviet assets and deploy + task certain American space assets and then bring them back to Earth.

And that's the bit that's hard to emphasize. The fact that the Shuttle could put a satellite up there, watch it fail, then go back up, grab it, bring it back, repair it, then launch again was an insane capability.

Was the program a giant fuck up at the end? Yes. But does that mean Artemis will be safer than the Shuttle? No. That's not how the energetics, time from civilization, acceptable risk profiles etc. work out.

Shameless plug, wrote a bit about the Apollo hagiography, Artemis and risk here –

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atherton94027 15 minutes ago
This was the farthest humans ever travelled from earth, even farther than apollo 13. Intuitively the farther you go the higher the risks are
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mackman 6 minutes ago
You are comparing orbiting earth in a shuttle to a lunar flyby in a pod. Very different risk profiles.
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627467 16 minutes ago
> That X decades later we accept, with all our advancements in tech, a weaker system than ever before

how do you keep past performance while stop performing it for XY decades?

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pictureofabear 28 minutes ago
An error in any of the orbital math may have seen them flung out into space with no chance of recovery.
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gct 22 minutes ago
Orbits do not work that way
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ggm 17 minutes ago
The craft has aerodynamics and speed. It might be figuratively true "unrecoverable" but if it takes e.g. 2 weeks to complete a return, their oxygen and food and batteries ran out. Alternatively if it enters too fast they return ... in pieces.

I think you're being a pedant, if your point is a grazing entry causing rebound skip ultimately returns to some orbital path downward.

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numpad0 10 minutes ago
Anyone who has had hit period key once too many during Munar free-return in KSP knows it's exactly how orbits work...
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philistine 49 minutes ago
I’d bet a million dollars that Orion will win every safety metric compared to the shuttle once it is retired. NASA deluded itself in thinking the Shuttle was safe. The reality is that the Shuttle was the most dangerous spaceship anyone ever built.
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areoform 13 minutes ago
That's physically not possible due to the distances and energies involved. Even with the Commercial Cargo and Crew Program (C3P), NASA has set the acceptable mortality threshold at 1 in 270 over the entire mission and 1 in 1000 on ascent / descent. If they could set it higher by gaming the math, they would. They can't.

We're a very primitive species, and the forces involved here are genuinely new. And no, Apollo wasn't much better either, at least 10 astronauts were killed in training or burned alive (8 NASA, 2 sister MIL programs), as well as (far worse, because astronauts sign up for the risk) one member of ground staff.

People love to hate the Shuttle, and it ended up being subpar / fail expectations due to the political constraints NASA was under, but the Shuttle was a genuine advance for its time – a nonsensical, economically insane advance, but still an advance. If you look at the Shuttle alternative proposals / initial proposals as well as stuff like Dynasoar and Star Raker, you'll see NASA iterating through Starship style ideas. But those were rejected due to higher up front capital investment at the time.

The Shuttle is an odd franken-turduckling, because it was designed for one mission and one mission only. And that mission never happened. That cargo bay existed to capture certain Soviet assets and deploy + task certain American space assets and then bring them back to Earth.

And that's the bit that's hard to emphasize. The fact that the Shuttle could put a satellite up there, watch it fail, then go back up, grab it, bring it back, repair it, then launch again was an insane capability.

Was the program a giant fuck up at the end? Yes. But does that mean Artemis will be safer than the Shuttle? No. That's not how the energetics, time from civilization, acceptable risk profiles etc. work out.

Shameless plug, wrote a bit about the Apollo hagiography, Artemis and risk here – https://1517.substack.com/p/1-in-30-artemis-greatness-and-ri...

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Waterluvian 30 minutes ago
Space flight safety is a function of culture and I don’t have any confidence that the culture has improved.
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echoangle 51 minutes ago
Wild that they manage to fly to the moon but still seem to be having those comms problems. Asking the astronauts if they’re really pressing the PTT button is wild.
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sho_hn 6 minutes ago
Just like in the year 3000, we will still ask "Can you hear me?" in video meetings.
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allenrb 13 minutes ago
My friends and I have been deriving much amusement from the comms issues. We can fly people around the moon, talk with them, send back high res video, but talk to the boat that’s close enough to swim to? Forget about it!

Note: next time, pack a walkie talkie. ;-)

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wewewedxfgdf 37 minutes ago
Cellphone coverage notoriously flaky in the Pacific.
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nodesocket 16 minutes ago
Umm it's a satellite phone.
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spike021 33 minutes ago
i was thinking maybe astronauts can be disoriented when splashing down and that's why they figured they should ask if the right buttons were being pushed?
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shermantanktop 34 minutes ago
...and informing them which button was the PTT button. She had to say it, but it'd be hard not to react to that.
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java-man 45 minutes ago
Good thing they have redundant systems.
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jrmg 39 minutes ago
It’s been amazing - and inspirational - watching the live stream of Mission Control and the capsule over the last ten days. Or at least having it as background audio. I’m going to miss all these folks I’ve grown to know.

Bring on Artemis III and IV!

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collinmcnulty 9 minutes ago
Watching this, I can only describe it as holy. An incredible reminder of what humanity can do, and the beauty of our curiosity and the universe around us. I grew up learning that my great uncle was in Mission Control for Apollo; missions like this are what inspired me to pursue engineering in the first place.
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qrush 50 minutes ago
Apparently there's more work than just clicking "Recover Vessel" after splashdown!
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elcapitan 38 minutes ago
This whole mission was amazing, and the most positive and hopeful thing I have seen as a global event in the last 5 years at least. Bravo and cheers to everyone involved :)
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eqmvii 2 hours ago
Held my breath the whole time after all the heat shield warnings. Very glad it all worked, or that there was enough margin!
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telesilla 2 hours ago
Yes it was worrisome, but how could it not be even with the best tech we'll ever have - I feel relief still on every plane touchdown.

Bravo, Artemis team for an exceptional return to extra-orbital space travel.

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Levitating 2 hours ago
The LOS was also more than 6 minutes as predicted (I measured a bit over 7 minutes). What a tension.
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llbbdd 60 minutes ago
I wasn't clear, was the LOS just comms or a full loss of telemetry from the craft? Either way, terrifying.
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loloquwowndueo 56 minutes ago
Everything. No radio signals make it in or out of the capsule due to ionization from the heat and plasma of reentry.
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philistine 53 minutes ago
I’ll note, since it is supremely interesting to me, that Starship is able to communicate with the ground during its whole reentry due to its sheer size and ability to connect with Starlink satellites. I assumed loss of signal due to reentry was a given for any spaceship!
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misterprime 2 minutes ago
Yes, I remember when they used the signal out the back through the plasma during reentry. It was astoundingly good!
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numpad0 5 minutes ago
[delayed]
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TomatoCo 18 minutes ago
The space shuttle, too, was able to communicate. I imagine the smaller the craft the smaller the angle you can "speak" out of and, below a certain size, it just doesn't work.
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llbbdd 23 minutes ago
Would this capsule had been been able to communicate if it was integrated with starlink or is the size more important? I'd imagine if they could have achieved communication via Starlink they would have done it, but just curious.
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albumen 2 minutes ago
No, the plasma forms a teardrop shape around small craft like Orion, completely cutting off radio comms. Larger craft like starship or the shuttle which have a roughly cylindrical shape (vs Orion’s circular cross section) aren’t fully enclosed by the plasma. The shuttle had a transmitter attached to its tail for later flights, which could send back telemetry during re-entry.
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neaden 2 hours ago
Same! Glad everyone made it safe.
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carefree-bob 50 minutes ago
"NASA reporting four green crew members. That is not their complexion, it is that they are in good condition. That's what that means." LOL
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em-bee 39 minutes ago
also astronauts: "the moon is quite a bit smaller than it was yesterday"

control: "i guess we'll have to go back".

(paraphrased from memory)

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Metacelsus 25 minutes ago
I guess they're not Kerbals :)
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sdoering 49 minutes ago
The humor was what really made my day today. Or in my case my night here in Germany.
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lysace 38 minutes ago
That speaker voice was a bit odd. Everything was perfect! At least one superlative every 5 seconds or so.

I think that audio stream was designed for POTUS.

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rogerrogerr 28 minutes ago
If we're going to have a surveillance state, let's use it for superlative control - one dollar in taxes for every superlative you use in personal life; $0.01/viewer for each one you use in any live televised event.

It's becoming a public hazard, we must act!

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lysace 9 minutes ago
Agreed.
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Gagarin1917 28 minutes ago
Watching that capsule fall out of the sky at high speed from the teaching cameras was nerve wracking! Awesome footage, exciting to watch it live in such detail.
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christophilus 14 minutes ago
Announcer just said “we just reenacted” the last Apollo mission. So, yep. That’ll be used as proof-text that this was all staged.
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decimalenough 8 minutes ago
I get that there are people who think the moon landing was staged, but are there really people who think rocket launches are staged? Because it's pretty easy to go witness one yourself.
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Isolated_Routes 5 minutes ago
Ad astra per aspera
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ggm 16 minutes ago
Dear NASA. Please dial back the poetics and rhetoric. Be more like ATC than Shakspear.
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mgfist 9 minutes ago
I think we've all become to numb and jaded. This is the first moon mission in 50 years and the furthest any human has ever been from Earth.
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nodesocket 13 minutes ago
What a curmudgeon. You must be great dinner company.
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Animats 11 minutes ago
Buzz Aldrin is reported to be watching this on TV.
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kethinov 48 minutes ago
For All Mankind aired an episode today that movingly commemorated the fictional lead character Ed Baldwin's Apollo 10-like in-universe mission on the same day that the real world Artemis II mission which also strongly resembles Apollo 10 landed safely. A strange and moving coincidence.
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credit_guy 41 minutes ago
This almost brought tears to my eyes. I can only imagine how people felt when the first astronauts got to the Moon, and then when they got back to Earth in one piece.
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darepublic 55 minutes ago
Cheers! Looking forward to future space travel!!
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nodesocket 14 minutes ago
Amazing live video of the descent and splash down. Really awesome to watch!
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latchkey 15 minutes ago
Went out to the beach hoping to hear/see something, but sadly grey skies and no boom. Tons of other people out there doing the same thing too.
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cube00 12 minutes ago
Dealing with the typical Excel foot guns on a mission like this is scary.

Missaved their version 2 Excel spreadsheet using the wrong file name causing confusion about this version was the latest.

Nearly missed a cell in their burn sheet had multiple lines of text until mission control reminded them to resize the cell.

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llbbdd 2 hours ago
"Reid Wiesman reporting all crew members green; that's not their complexion, all crew members are in good shape."
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philistine 48 minutes ago
Dammit. I hoped Jeb was on board for a second.
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java-man 59 minutes ago
I noticed a delay between video and audio - the announcer on the NASA official live broadcast said splashdown before the the capsule splashed down on video. Was it intentional (in case something happened)?

Also, what were these puffs on thermal camera after the main chutes were deployed?

https://www.youtube.com/live/m3kR2KK8TEs

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shoghicp 57 minutes ago
RCS (Reaction Control System) which you can see on Artemis I internal video as it falls down https://www.youtube.com/watch?v=-QbYrs5SZ5M
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llbbdd 57 minutes ago
I was wondering about that too, I assume maybe there was some additional adjustments needed to land in the right spot, but they didn't mention it on the stream.
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java-man 56 minutes ago
Yeah, they looked intentional - there are no reaction wheels on the capsule.
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hydrogen7800 54 minutes ago
My suspicion was they were burning excess propellant, rather than attitude adjustment while under the parachutes. Though who knows how much propellant remained. It could be quite a bit more than it appears was used.
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devilbunny 44 minutes ago
Not just excess - excess and toxic. Hydrazine derivatives and nitrogen tetroxide, IIRC. They are hypergolic, too, so the easiest way to vent them is just to run the engines until empty. However, to prevent moving the craft too much, you do short bursts.
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TomatoCo 11 minutes ago
There should be an opposite thruster for each axis. I wonder if the short bursts were due to heating limits.
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rvz 52 minutes ago
Now this is actually for the benefit of humanity.
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jrmg 43 minutes ago
…and this is how the America I thought I knew growing up projected its influence upon the world.
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EdNutting 40 minutes ago
Notwithstanding that this mission critically relied upon Canada, UK, EU, Japan, Taiwan, and contributions from many other countries.
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jrmg 33 minutes ago
Collaboration like that is all a (positive!) part of projecting influence - in both directions.
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GeoPolAlt 27 minutes ago
At least now there’s something to celebrate for America’s 250th this year
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BoredPositron 36 minutes ago
I don't know how to describe the feeling but it feels like a bad movie remake. Maybe I am just a sucker for practical effects and not 2020s CGI to stick with the metaphor and conspiracy...
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pwndByDeath 26 minutes ago
As a long time space nerd, I'm not sure what this accomplishes by repeating the previous stunts that failed to usher in the promised space frontier.

Apollo was, IMO, not successful at changing the course of human history. A really cool footnote, sure, but everything else that was to follow, nope, just a bunch of neat, interesting but ultimately meh science missions.

An exciting change would be more like Delta-V/Critical Mass, but NASA is not going to deliver that, at least not in any form it has taken thus far.

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adamsb6 19 minutes ago
They can't just build Apollo 18 and resume the program as if there weren't a 50 year hiatus.

Imagine if your employer wanted to start using a software system it retired in 1972. What would you do?

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brcmthrowaway 21 minutes ago
What is delta v/critical mass?
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