@GrantObi @unicornflyers @SpaceInMiBrain Plus that wasn’t a NASA project originally, but done in cooperation with the SDIO.
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Nathan
22.7K posts
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Actually, nobody knew if supersonic retropropulsion was possible. NASA had a whole program set up to start testing it, specifically for Mars environments. Anyway, SpaceX just went ahead and tried it on a mission, it worked, the rest is history.
PebMets@PebMet1
I want to correct a misconception @elonmusk and @SpaceX follower keep repeating. - No one thought reusability was crazy or impossible before Musk/SpaceX. Shuttle orbiters and SRBs did it 1981-2011 so we knew it was possible because we did it.
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@AlpineCipher @xdNiBoR It would cost him far too much on an emotional level to admit he made a mistake, and his ideological confreres would crucify him if he did. NASA has to be seen as the greatest and the source of all ideas and progress, or people like PebMets get very upset.
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Incorrect. People said "reusability is a dream".
PebMets@PebMet1
I want to correct a misconception @elonmusk and @SpaceX follower keep repeating. - No one thought reusability was crazy or impossible before Musk/SpaceX. Shuttle orbiters and SRBs did it 1981-2011 so we knew it was possible because we did it.
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@_hoolio @peterrhague Another: agricultural engineering. Anyone living beyond Earth will want to maximize agricultural productivity, given the dearth of soil they’ll have, and for anyone not living on Mars or Earth, low solar flux, requiring artificial energy for growth.
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@CosmoN8 @peterrhague What incentives are these in particular? Genuinely curious
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I keep hearing people tell me how expensive space is. How its such a frivolous waste. Its utter nonsense.
SLS/Orion is basically the most expensive rocket currently flying, and even using that as a yardstick, the UK government throws money away at a far larger scale.
Just look
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@_hoolio @peterrhague For example, robotics: because of the premium on human labor, there will be a strong forcing function to push robotics development to a degree we can barely imagine today. Yes, we develop robots now, but think of the pressure induced by war, and that’s closer to what we’ll see.
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@Lt_Sid8 @peterrhague The military is the fifth largest item in the US federal budget, we spend a lot more on welfare. Exploration for its own sake is not worth very much, but if done in service of other goals (such as settlement) it can be extremely valuable.
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@peterrhague the US military alone is like 300x more. its ridiculous how space exploration is considered a waste of money
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@_hoolio @peterrhague You’re framing this as either-or when really it’s both-and–we’ll settle space and improve life on Earth in the process, through the incentives that living offworld provides.
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@peterrhague Lol. It is obviously stupid to put so much effort into travelling so far and building something livable when we have this entire planet we have evolved to live on. It is plainly evil to push this living in space nonsense as a salvation and be against some version of eco-socialism
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@AntiClanker1337 @peterrhague Healthcare is worth it, but healthcare is also a devouring monster that can and will consume everything if we let it. There’s a balance to be struck, and there’s a lot of waste and red tape that we could do without too (without reducing the quality of care).
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@peterrhague Yo can claim it's not efficient, but then neither is SLS.
However you're a ghoul do you don't think healthcare is worth it.
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@NightJanit0r @peterrhague As I recall, that’s just for SLS/Orion development alone, not including previous programs; and the SLS doesn’t lift 130 tons, that was planned for Block II. Heavy lift is technically defined to be as little as 20t, super heavy is 50t or more.
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@peterrhague IMO the $4.1B figure is a bit spurious, as it includes the development costs across multiple programs, some of which were cancelled.
Also, it's currently the only heavy-lift rocket available. FH 64 tons vs SLS 130 tons.
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@Robotbeat You get a lot of use out of this GIF, and for so many things!
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Americans coming to rescue one guy:
ハートマン提督@Gunny_SukumoHQ
以前ネリスでCSARデモ見た時に、A-10やらF-16やらF-35やらが援護して、なんとでもして助けようって気迫を感じたけど、 実際にもその時撮った写真みたいな構成で助けに行ってて流石アメリカ軍凄いなぁと
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@ThePrimalDino @BellikOzan Even if including SLS means slowing down our plans to fit within its limits?
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@BellikOzan I’m generally amenable to most architectures so long as SLS isn’t outright canceled. I want to see it do work to help with our ambitious plans, but I DO want to see these ambitious plans come to fruition
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Agreed.
I'm so happy that David and I see eye to eye on something SLS related.
I'd also add they can do EO rendezvous for lunar missions with Starship and save the ICPS for the first Blue Moon crewed landing.
David Willis@ThePrimalDino
My personal opinion here is that NASA needs to save that ICPS for Artemis IV. Who knows how long it will actually take centaur to get configured if that does end up happening. Such a thing could end up significantly delaying our Moon landing. Use the ICPS and LVSA STAs or some kind of spacer, but save the real hardware for the mission that needs to go TLI.
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@BellikOzan Anything is possible with enough massaging of the inputs to get the output you want! More seriously, though, it’s why we need to have a good idea of what we want, and to question ourselves and our requirements, not just others’.
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You can ignore the first column. That's just the architecture accommodation we've all been complaining about for years.
What's missing are the columns that shows the frequency of Earth access and lunar access opportunities.
50m/s is very manageable, and a piece of cake to the kind of electric propulsion Gateway was going to have.
The comms occultation is easily solved with a few relay satellites we should have anyway.
You actually can do thermal management with passive cooling in LLO, not that any Artemis s/c has passive only thermal management. If they're talking about some radiator baseline, that's an architecture accommodation. I'll grant though that staying cool is easier in higher orbit.
Archivist@SpaceArchivist_
reminder that NRHO is actually a really useful orbit! and it's very useful to have a station there as a staging point!
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@RokoMijic @PhyrexianP @ArtemisConsort Solar flares have hit Earth a fair number of times already, and Starlinks, which aren’t known for dense shielding, have survived with aplomb. A Carrington event would be genuinely worrisome, but those are very rare.
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@PhyrexianP @ArtemisConsort Some but not all. I think it nets out to about 50%
But if there's a solar flare, you are fucked.
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It’s hilarious how proud of themselves people are for noticing the very first thing anyone would notice about space data centers. I too had the thought “what about cooling” the first time I saw the idea, then I saw huge companies betting on it and assumed I was missing something rather than that no one at SpaceX etc had the BRILLIANCE I had to notice this obvious phys 101 objection, because I’m not a moron.
And yeah, turns out you can make radiators work.
David Bombal@davidbombal
Why space servers FAIL Execs want to put data centers in space, but there's a massive physics problem: vacuums have no convection cooling. Discover why cooling servers in space relies purely on infrared radiation! Big thanks to @ThreatLocker for sponsoring my trip to ZTW26 and also for sponsoring this video. To start your free trial with ThreatLocker please use the following link: threatlocker.com/davidbombal
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@shawmakesmagic @RokoMijic @ArtemisConsort Latency isn’t critical for all data center jobs, and early data centers in space will be designed for disposal. Orbital maintenance will only come later, as launch costs drop, and our robotic capabilities improve. The primary challenge is money, not engineering.
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@RokoMijic @ArtemisConsort And latency, and maintenance
It’s fucking stupid and we all know it
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@RokoMijic @ArtemisConsort Cooling is pretty easy in space mechanically. Energy is a challenge on Earth, whereas in space solar can be usable nearly 100% of the time. Starcloud has a good white paper about the topic on their website.
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@ArtemisConsort Servers in Earth Orbit only make sense if there is some political restriction to building on the surface, because cooling is harder in space, even ignoring launch costs.
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@TungstenBlock @ArtemisConsort ‘All the time’ isn’t really true. Debris varies from orbit to orbit, and we can make good estimates of how likely impacts are in a given orbit. Then you oversize your hardware to account for losses. It’s not a massive challenge.
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@ArtemisConsort I had the same thought and studied the issue and it turns out the radiators would have to be so enormous that they would be catching stray space crap all the time. It's a technical challenge to say the least.
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@BellikOzan @Anton81191831 Likewise. Federal efforts aren’t meaningless, but NASA doesn’t have the culture (or really, in my estimation, the justification) to drive progress. Where it really matters, whether propulsion, energy, spacesuits, manufacturing, etc., the private sector has largely taken the lead.
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@CosmoN8 @Anton81191831 Yeah, probably. Whereas at this point NASA accounts for ~5% of my space program interest, so I'm not very emotionally invested either way.
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NASA administrator before and after he was the NASA administrator: "We should cancel wasteful programs and do more with less."
NASA: Proposes ending programs the administration deems wasteful, reducing the budget while asking for more money for a few priorities.
Online audience: 😱😱😱🤬🤬🤬🤯🤮🤬😱 "Blink twice, Jareeeed!"
I think when you all context compressed, you kept "I like Jared" and "Jared loves NASA" and tossed out the things Jared actually said about how he wants NASA to be run.
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Nathan 리트윗함
Gravitics has begun execution of its STRATFI contract with the U.S. Space Force, advancing the development of pre-positioned orbital infrastructure for responsive space operations.
This phase includes two in-orbit demonstrations:
◾️An Orbital Carrier pathfinder
◾️A Viper OTX mission for high-energy orbit delivery
This marks the transition from development to funded execution and movement toward in-orbit validation. gravitics.com/news/space-for…
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And they can't even make a handy guide if which oppression trumps which, like in poker, because they don't know and when they do know, it's always changing.
Libs of TikTok@libsoftiktok
Speakers at the Democratic Party conference in Canada argue over their “gender equity cards” which allows them to skip the line to speak This is real
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