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trothamel

4,130 karmajoined 15 ปีที่แล้ว

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What to expect from the fiery, 14-minute return of Artemis II

arstechnica.com
2 points·by trothamel·3 เดือนที่ผ่านมา·0 comments

Earthset (Artemis II)

images.nasa.gov
4 points·by trothamel·3 เดือนที่ผ่านมา·1 comments

Watch Artemis II's Closest Approach to the Moon [video]

youtube.com
2 points·by trothamel·3 เดือนที่ผ่านมา·0 comments

My third Orion launch, but it feels different

arstechnica.com
1 points·by trothamel·3 เดือนที่ผ่านมา·0 comments

Ignition: NASA's Plan for the Moon [video]

youtube.com
1 points·by trothamel·4 เดือนที่ผ่านมา·1 comments

Cooling Datacenters in Space – Doing the Math

patreon.com
1 points·by trothamel·4 เดือนที่ผ่านมา·0 comments

Discord Posts "Age Assurance" FAQ

twitter.com
2 points·by trothamel·5 เดือนที่ผ่านมา·0 comments

NASA to Save $1.4B by Insourcing

twitter.com
2 points·by trothamel·5 เดือนที่ผ่านมา·0 comments

The Spacecraft That Wouldn't Die

corememory.com
50 points·by trothamel·5 เดือนที่ผ่านมา·11 comments

NASA is kind of a mess: Here are the top priorities for a new administrator

arstechnica.com
4 points·by trothamel·8 เดือนที่ผ่านมา·0 comments

4chan fined $26K for refusing to assess risks under UK Online Safety Act

arstechnica.com
5 points·by trothamel·9 เดือนที่ผ่านมา·1 comments

Trump Card – Pathway to American Citizenship

trumpcard.gov
16 points·by trothamel·10 เดือนที่ผ่านมา·3 comments

comments

trothamel
·3 วันที่ผ่านมา·discuss
https://x.com/SawyerMerritt/status/2064108916611420273?lang=...

While I'd suspect the design is still in flux, the current design is for a 120kw satellite with 110 square meters of radiators. Scaling to hundreds of gigawatts is intended to be by repeatedly launching smaller designs.
trothamel
·21 วันที่ผ่านมา·discuss
Offhand, do you know what format that data is in? Is it a question and then a human answering that question? Mostly just curious at to what the training data consists of.
trothamel
·เดือนที่แล้ว·discuss
I suspect that this is the start of a play for SpaceX's orbital datacenter project - if they're really planning on launching as many satellites as they've said (and Starship is going to massively lower the cost of launch), they won't be able to fill them with Grok. So perhaps it's best to become the infrastructure provider to the other AI Labs.
trothamel
·2 เดือนที่ผ่านมา·discuss
After the accident, Apollo 13 had 4 burns.

The DPS-1 burn which restored the free return trajectory was done using the Apollo guidance computer.

The PC+2 burn which sped up the return from earth was done using the Apollo guidance computer.

The MCC-5 mid-course correction burn was done by hand.

The MCC-7 mid-course correction burn was done by hand, but used the Apollo guidance computer to integrate the accelerometer to let everyone know when the burn was done.

(All the burns on Apollo 8 were computer controlled. I'd assume Gemini 7 and 12 were hand flown, though I don't know for sure.)
trothamel
·2 เดือนที่ผ่านมา·discuss
So, that's generally not something local governments do in the US. They do things like increasing taxes on data centers, denying water rights, electric interconnection rights, etc. (At least, all of this has been threatened against data centers.)
trothamel
·2 เดือนที่ผ่านมา·discuss
SpaceX's launch capacity is an order of magnitude larger that all four of those put together.
trothamel
·2 เดือนที่ผ่านมา·discuss
It's putting AI processing out of the reach of hostile local, state, and international governments. Does it need to be a cover?
trothamel
·3 เดือนที่ผ่านมา·discuss
This is a really good point, especially since a similar plan was attempted once before and failed.
trothamel
·3 เดือนที่ผ่านมา·discuss
That was a great article.

Adding to it - Apollo 13 was a mission where 3 men should have died, but somehow didn't. If it had happened while the LM was on the moon, you would have had the CSM lose power, and then two men on the moon would have had no way to return home.

(And for the shuttle design mission - my understanding is it was likely the ability to do a HEXAGON-style film return mission in a single orbit, before the Soviets knew what was happeneing.)
trothamel
·3 เดือนที่ผ่านมา·discuss
This is about to change.

New NASA administrator Isaacman has redone the Artemis program. The changes were announced at the Ignition event a few weeks ago:

https://www.nasa.gov/ignition/

If you read one thing, read the sides on building the moon base:

https://www.nasa.gov/wp-content/uploads/2026/03/2-building-t...

The goals it to fly often - adding a SLS launch to 2027 and a second launch to 2028. This drops the cost-per-launch, which is mostly fixed. It redoes SLS to make it less expensive and more capable. It moves the lunar space station down to the surface of the moon.

And it's budgeted at $10B/3 years, which fits into NASA's budget.

Isaacman took the Artemis program and fixed it. The reckoning came, and it's looking good.
trothamel
·3 เดือนที่ผ่านมา·discuss
Also Artemis II in eclipse.

https://images.nasa.gov/details/art002e009301
trothamel
·3 เดือนที่ผ่านมา·discuss
They just set the record for being farther away from Earth than anyone else.

The commander just named a feature on the moon for his late wife.
trothamel
·3 เดือนที่ผ่านมา·discuss
We're about to find out.

The new NASA administrator, Isaacman, seems to have done a very good job of convincing the various Senators to, if not get rid of the pork, allow him to allocate it in a way that benefits the lunar program.

The result was the Ignition event, which looks like it's planning to send up 17 small and 4 crew-capable landers by 2028, along with a fleet of orbital assets.

You can find out more https://www.nasa.gov/ignition/ , especially the "Building the Moon Base" section. The cost is $10B spread out over 3 years.
trothamel
·3 เดือนที่ผ่านมา·discuss
Successful space travel is one of the few big news events where nobody has to be unhappy.

Most of the other big news events are ones where people get severely hurt, and political ones where one partly loses.

With this, we can look up at the moon, and say "Humanity did that."
trothamel
·3 เดือนที่ผ่านมา·discuss
This is a perfect way to put it.

Artemis II is not safe, at least by the standards we apply to things. It's the third flight of a capsule, on the second flight of the rocket, and the first flight of things like the life support system.

At the end of the day, one of the reasons astronauts are respected is they understand those risks, and go into space anyway. That doesn't mean we shouldn't try to minimize risks - but at some point the risk becomes acceptable, and the cost of reducing it too great.

To paraphrase a quote from Star Trek - risk is their business.
trothamel
·4 เดือนที่ผ่านมา·discuss
Text version of the introduction: https://xcancel.com/NASAAdmin/status/2036428252693078055
trothamel
·4 เดือนที่ผ่านมา·discuss
There's a version of this built into the Google Fit application for Android.
trothamel
·4 เดือนที่ผ่านมา·discuss
A couple of new posts by Nasa Administrator Isaacman:

Launch cadence across NASA programs:

https://x.com/NASAAdmin/status/2027456699175497741

An infographic showing the new architectures:

https://x.com/NASAAdmin/status/2027456713507356713

It's interesting how Artemis III (the new one) will try to prove out both HLS landers in one LEO mission.
trothamel
·5 เดือนที่ผ่านมา·discuss
Interest also compensates for the other things that money could be doing. If I didn't loan it to you (or a student), then I would be doing something else with the money, even if just buying a government bond.
trothamel
·5 เดือนที่ผ่านมา·discuss
Don't forget polaroid in that.