The Space-Based Data Center Hype Machine Is Already In Orbit
14 190IEEE Spectrum argues that orbital data centers remain far from economically or technically practical despite Elon Musk's prediction that space will become the cheapest place to run AI within a few years. Deploying SpaceX's proposed million-satellite constellation would require enormous increases in launch and manufacturing capacity, while cooling, radiation, maintenance, latency, orbital debris, and astronomical interference present major unresolved obstacles. Longtime Slashdot reader xetdog shares the report: Consider this: There are roughly 14,500 active satellites in orbit. Musk's Starlink constellation accounts for about two thirds of those. Both the launch cadences and satellite-manufacturing capacity would have to scale up astronomically to deploy a million orbital data center satellites. For context, there have been roughly 7,000 orbital launches in all of human history. To loft 1 million satellites into low Earth orbit on SpaceX's Starship, which is designed to carry up to 60 satellites per vehicle, would require 16,666 launches exclusively devoted to satellite deployments. Considering that SpaceX launched a record 165 orbital missions in 2025, even at 10 times that cadence, it would take a decade. And how long would it take to build 1 million satellites, given Starlink's current pace of around 4,000 per year and a generous tenfold increase in capacity? Short of a manufacturing revolution, try 25 years. Dissipating heat in space also requires enormous radiators. As IEEE Spectrum editor Dina Genkina noted, startup Starcloud has sent only one Nvidia H100 GPU into orbit, and "their radiator was too weak to let the chip run at full power." A single 700-watt H100 would require about 1.4 square meters of radiator area, while a 100-megawatt data center could need 2,500 radiators measuring 80 square meters each.
So, why are the hyperscalers hyping orbital data centers? Answer: because it's lucrative. "The Elon Musk part of it is honestly genius because he's got xAI building the data centers, SpaceX sending them to space, and Tesla building solar panels," Genkina says. "It's almost like he's paying himself."
14 comments
Re:So basically... (Score: 5, Insightful)
by Anonymous Coward ( None ) on Thursday July 02, 2026 @08:31AM (#66219652)
Not lies, a carefully crafted scheme to defraud investors of their money
Re: So basically... (Score: 5, Insightful)
by ceoyoyo ( 59147 ) on Thursday July 02, 2026 @12:56PM (#66220036)
What's the downside? SpaceX stock got pumped for their IPO. The money is made. As long as the hype keeps going they can raise more any time they want, or Elon could sell some of his shares. If it turns out to be unworkable, SpaceX (and subsidiaries) are back where they started.
There aren't really any unsolved engineering problems. SpaceX can absolutely put a rack of nvidia GPUs into low orbit. We could have done that in the 70s. The argument is whether it's economical or not.
Which is cheaper, putting a thousand square metres of solar panels, a rack of GPUs, a vacuum cooling system and propulsion in low orbit and incinerating and replacing it all every few years, or the panels, GPUs and a convective radiator that is ~50x more efficient on the ground and runs for twenty plus?
Re:So basically... (Score: 5, Insightful)
by evanh ( 627108 ) on Thursday July 02, 2026 @09:42AM (#66219728)
The scary part is Musk isn't alone. The insanity of the LLM data-centre build out has got far too much money thrown at it already. There's no way it will be recouped. It can only end badly now.
Re:So basically... (Score: 5, Informative)
by swillden ( 191260 ) on <shawn-ds@willden.org> on Thursday July 02, 2026 @02:32PM (#66220220)
... it's just another pack of lies like everything else Musk hypes up.
Counterargument: Who would have predicted a few years ago that one private company would dominate global launch, launching more by every metric than the rest of the world combined, and -- all by itself -- triple the number of satellites in orbit in 7 years.
Sure, 200Xing the satellite count is a lot harder than tripling the satellite count, about 66 times harder. But if Starship is successful (by no means a given, also far from impossible), SpaceX will reduce per-kg launch costs by 100X, maybe more.
I'm skeptical... but I would also not just write it off as a "pack of lies". The things SpaceX is actively working on should make the launch part of it feasible. Will it be cost-effective? That's a harder question, and heat dissipation is the core thing that may make it infeasible.
Also, the final paragraph of the summary seems to be confused:
Yes, SpaceX will be incredibly lucrative if it owns the whole vertical stack, building, launching and powering -- but only if it works. If it doesn't work, and if orbital compute isn't cheaper than planet-bound compute, then SpaceX will have no buyers.
The other possibility is that it's just a pump and dump, but that's not how Musk has ever worked in the past. Yes, he makes crazy promises, and delivers only half of them, and delivers years after the promised date, but those half-realized, years-late results are still often world-changing.
Re: Rax the Tucking Fich! (Score: 5, Informative)
by MachineShedFred ( 621896 ) on Thursday July 02, 2026 @01:15PM (#66220082)
So you would rather that we burn millions of tons of methane to hoist disposable data centers into orbit which cannot be serviced, so that they can fall out of the sky someday and we can burn millions of tons of more methane to replace them, because some asshole has a shitload of money to try it, in order to make more money for himself at the cost of whatever simpletons (like yourself) buy his bullshit?
All the other things you talk about were never thought to be stupid, or a solution in search of a problem. They were research for the sake of expanding human understanding, which were then applied by engineers to do useful things. You can't even get that bit right.
Just because you *can* do something, doesn't mean you *should* do that thing. This is purely stupid, for purely stupid reasons - the billionaires are tired of doing what jurisdictions say, so they're trying to find somewhere extra-jurisdictiony to put their equipment.
This is a more expensive, less practical "Sealand" with a limited lifetime of operation that disproportionately pollutes. But you think that's a perfectly fine pursuit.
Re:Bet against Elon if you like (Score: 5, Interesting)
by DrXym ( 126579 ) on Thursday July 02, 2026 @08:04AM (#66219634)
The counter argument, is if they've gone to these efforts to develop chips so thermally & energy efficient for their workload they can run in space then why bother launching them into space in the first place?
Re: Bet against Elon if you like (Score: 5, Interesting)
by AleRunner ( 4556245 ) on Thursday July 02, 2026 @08:53AM (#66219672)
Size is free unlike on earth
This is the kind of assumption that people are making which shows how this is wrong
* the bigger it is, the directly proportionally higher chance some part of it it will get hit by something, which has a decent chance of having a cascading effect on the other components
* you've pointed out weight, which obviously comes with size - but you haven't pointed out that size =>weight => fuel needed to maintain orbit. Even with ionic thrusters using electricity and very very low fuel use this will matter.
Guess who has the data to do forward predictions.
people who are working on optimizing the energy needed by AI models - specifically the Chinese AI researchers and probably Google. If model sizes can be reduced with very limited loss of performance then the costs of putting them in space - especially latency as opposed to a local model - will be hugely damaging.
So I am guessing they have a target pricing on lbs that they can hit to make that business viable.
There's one business model which is absolutely crucial and everyone needs to understand that Elon is fundamentally sucking on the government teat, whatever people pretend. Military people need to run AI models in situations of compromised ground communication. Running, for example target identification and data selection in space makes 100% sense. Elon will be doing this in the knowledge that he's got a series of guaranteed government contracts that will pay for all the development he's doing. The risk in this case is that if a non-corrupt government does ever return in the US, they may audit his contracts and punish him for getting them through what they will consider to be illegal influence.
Re: Bet against Elon if you like (Score: 5, Interesting)
by cmseagle ( 1195671 ) on Thursday July 02, 2026 @10:02AM (#66219766)
Military people need to run AI models in situations of compromised ground communication. Running, for example target identification and data selection in space makes 100% sense
That seems like a benefit of relying on satellite communication rather than a benefit of putting the data center in space.
What's the benefit over running the computation on the ground in a "normal" data center, beaming the results up to a satellite constellation, and then beaming them back down to those who need it? Starlink/Starshield already enable that.
Re:Bet against Elon if you like (Score: 5, Insightful)
by gtall ( 79522 ) on Thursday July 02, 2026 @08:26AM (#66219646)
Another counter argument is that Elmo doesn't give fuck about damaging the environment so shoving oodles of his tat into space won't bother him, either the pollution of the launches or filling the skies with his tat. And it isn't clear why we need all them datacenters other than to make him and his buddies richer and more powerful. Their idea is that money = power and with enough of it, they can direct the lives of everyone else. Just like a good little Nazi.
Re:Bet against Elon if you like (Score: 5, Insightful)
by drinkypoo ( 153816 ) on <drink@hyperlogos.org> on Thursday July 02, 2026 @09:19AM (#66219698)
Ah, ad hominem attacks, the sure sign of someone who has a really strong argument.
You don't even know what an ad hominem attack is, since I didn't make one.
Learn what words mean before you use them, kid.
Re:Bet against Elon if you like (Score: 5, Insightful)
by Anonymous Coward ( None ) on Thursday July 02, 2026 @09:27AM (#66219710)
An ad hominem would be "Elon is wrong, because Elon is awful". Saying "Elon is awful and also is wrong about space datacenters" is not an ad hominem.
Re:Bet against Elon if you like (Score: 5, Insightful)
by caseih ( 160668 ) on Thursday July 02, 2026 @09:57AM (#66219758)
Silly assumptions? A matter of Engineering? What about physics? Maybe listen to real engineers for once. They've been showing us the actual numbers that state clearly this AI data centers are not possible. Sure you can get lots of solar power, but that's not the issue. The issue is cooling, requiring huge radiators that are far bigger than each satellite. Besides the impracticality of it, you have other issues like air pollution (already a problem with starlink deorbiting), light pollution (who needs the stars anyway). Apparently no on in Musk's circle is asking, "but should we do this?"
Re:Bet against Elon if you like (Score: 5, Insightful)
by MachineShedFred ( 621896 ) on Thursday July 02, 2026 @01:20PM (#66220100)
There is literally no hardware advancement that makes sense to operate in space, that doesn't make more sense to operate right here on the dirt.
Why? Servicing and ionizing radiation.
We see elevated failure rates of SSDs in aircraft flying at 36,000 feet from controller firmware getting bit-flipped by passing neutrinos. Do you think that somehow improves by putting the SSDs into even more cosmic radiation exposure, and having less opportunity to service / replace the hardware?
We see hardware using MORE electricity and shedding MORE heat over time, not less. We have an atmosphere and bodies of water to dump heat into here. You don't have anywhere besides passive radiation to dump heat in space, which means building HUGE passive radiators, which are huge targets for micrometeor strikes and space junk. All on hardware that you have a limited fuel tank on before it falls out of the sky, and no way to service.
None of this makes sense, but because you want to fanboi hard on Elon for some reason, you think he has some secret physics-defying sauce right around the corner.
Re-evaluate your critical thinking skills.
Re: Bet against Elon if you like (Score: 5, Interesting)
by caseih ( 160668 ) on Thursday July 02, 2026 @10:02AM (#66219770)
Giant black-body radiators are required. This is the the number one reason why space data centers are not practical. The radiators would be many times bigger than the satellites themselves. Every watt of energy generated by the solar panels has to be radiated into space. This is not something that can simply be engineered around, as the OP seems to think.