The Big ReadWhy Eric Schmidt and Jeff Bezos Are High On Space Data Centers
Soaring demand for electricity to power data centers is creating buzz around the idea of putting them into orbit, where they can tap into uninterrupted solar energy.
If all goes as planned in August, a startup called Starcloud from Redmond, Wash., will load a rocket bound for space with a refrigerator-sized satellite, the first to contain an Nvidia H100 chip. Normally, that chip is at the heart of the sprawling data centers back on Earth that run the latest artificial intelligence models.
Compared to existing data centers, the Starcloud satellite will be almost comically under-powered: It may have only enough computing muscle to run less demanding versions of Google’s Gemini and OpenAI’s GPT models, according to Starcloud CEO Philip Johnston. Still, the satellite will be the most powerful computer in orbit, with 100 times more processing power than the International Space Station and other satellites, according to Johnston, whose company raised $21 million out of Y Combinator in 2024, one of the year’s largest rounds from the incubator.
And, ultimately, Starcloud wants to build the first gigawatt-scale data center in space, with bays full of AI chips powered by a massive solar array spanning 4 kilometers by 4 kilometers.
Hot on Starcloud’s tail fins is another space company, Axiom Space, which plans to launch two orbital data center nodes with a mix of CPU and GPU chips capable of “running some low grade AI” by the end of the year as part of a network of communications satellites for military and commercial clients, according to Jason Aspiotis, Axiom’s global director of in-space data and security. And it’s not just startups that want to put cloud computers above the clouds—some of tech’s most influential billionaires buy into the idea too.
In April, when a journalist on X suggested that former Google CEO Eric Schmidt bought a controlling interest in a rocket company, Relativity Space, with the goal of putting data centers into orbit, Schmidt replied with one word: “Yes.”
Meanwhile, Jeff Bezos has long said that he started his rocket company, Blue Origin, to make it possible to move pollution-belching industries off Earth. According to a person who has discussed the subject with him, data centers are among those industries that he believes belong in space long term. That’s telling coming from the guy who did more than anyone to kick off a frenzy of data center building when he ran Amazon, which operates the No. 1 cloud computing provider, Amazon Web Services.
Still, to say that the concept of orbital data centers has its doubters would be a bit of an understatement. There’s a head-spinning array of technical and financial impediments to making them work—from guarding their computers against radiation, to maintaining them, to affording the expense of getting all that hardware into orbit in the first place. Sure, maybe a company can stick a few computers running lightweight AI models in space, but launching and operating AWS-sized data centers in orbit is science fiction, skeptics say.
“Show me the calculations that suggest this is even feasible,” said Oren Etzioni, the former CEO of the Allen Institute for AI and a professor emeritus of computer science at the University of Washington.
It isn’t likely there’d be much talk of sticking data centers in orbit if there wasn’t a borderline freakout back on Earth about how to power them all. In the U.S., data centers are forecast to consume 12% of total U.S. electricity by 2028, up from 4.4% in 2023, according to a U.S. Department of Energy report last year.
Electricity-hungry AI models are expected to be the biggest factor in that surge. Already, power companies are struggling to keep up with the demand, and electricity bills are rising for consumers. Big data center operators like Amazon, Microsoft, Google and Meta Platforms, meanwhile, are plowing money into nuclear power, geothermal and other sources of clean energy to meet their future needs—though it’s too soon to say whether and when those investments will pay off.
Orbital data centers have a tantalizing answer to the power problem: uninterrupted access to solar energy, without the hindrances of weather, night time and seasons. That means they could enjoy dramatically lower operating costs while also combatting climate change by reducing the reliance on fossil fuels, which currently account for 60% of total U.S. energy consumption. That’s the theory, at least.
This isn’t the first seemingly wacky plan to put data centers in an exotic location for environmental and cost reasons. In 2018, Microsoft researchers dropped a data center encased in a steel tube to the seafloor near Scotland’s Orkney Islands, which allowed them to tap into the cooling effect of the ocean’s chilly subsurface waters. After two years of testing, Microsoft plucked the data center from the water and called the experiment a success, but it hasn’t put another one back in down there.
Other countries are also eyeing orbital data centers, which could prompt competition with the U.S. to build them first. Last month, China launched a dozen satellites that will eventually be a part of an orbital computing constellation of 2,800 satellites that can run AI models and perform other computing chores.
Orbital data centers are starting to pick up buzz in Washington. In April, during the Hill & Valley Forum, a gathering of tech and political luminaries in the city, Republican Senator Mike Rounds of South Dakota told an audience that U.S. control of AI won’t happen unless it can solve the energy problem it’s creating—and that it has to consider the option of putting data centers in space.
“I know it sounds crazy,” said Rounds, who serves on the Senate Armed Services Committee. “We’ve got to be talking unique and innovative ways as we move forward into the future.”
Jack Clark, co-founder of the AI startup Anthropic, who was sitting next to Rounds at the event, responded: “You don’t sound crazy at all. We’re big fans of putting the computers in space.”
On Earth, new data centers often meet with fierce opposition from homeowners, preservationists and other groups. In space, there’s a different kind of hostility to them.
Like anything in orbit, data centers will be constantly bombarded by radiation from solar flares, cosmic rays and Earth’s magnetic field. Experts say that radiation could disrupt the performance of the densely packed rows of AI chips inside orbital data centers. This will require backup chips, ample shielding and other robust materials, all of which will add weight to those systems. Every additional ounce will make for a more expensive launch.
That’s not all. There are collisions with satellites and space debris to worry about, requiring tracking and coordination to dodge those objects. And then there’s the challenge of how to keep all those computer chips from overheating, a task that terrestrial data centers normally handle by circulating large quantities of fresh water around their equipment.
While the frigid temperatures of space provide an obvious way to cool those machines, orbital data centers will still require radiators to dissipate waste heat—very, very big radiators.
In one analysis of space-based computing last month, former NASA administrator Dan Goldin estimated that a 100-kilowatt data center would need a radiator larger than a tennis court. (Typical large data centers consume at least 100 megawatts, or 1,000 times more). A one megawatt data center would need something more like a soccer field.
Starcloud, for one, believes it can figure out these issues, even though no one has ever shown it can be done at scale before. In a mock-up video, Starcloud shows a hypothetical 5-gigawatt orbital data center with a stem-and-leaf design featuring a vast array of solar panels. A radiator on the backside of the solar panels will dissipate heat.
In its design, the data center will consist of dozens of containers filled with networking switches and server racks. After being released from the cargo bay of a rocket, the containers will autonomously dock themselves to a stem that runs between the two sections of Starcloud’s solar array. The data center will use lasers to communicate with existing satellite internet constellations—whether SpaceX’s Starlink or eventually Amazon’s Kuiper—that will transmit data to and from Earth.
In the near term, Starcloud says its data centers will be much smaller than the one shown in its movie—and the cost will compare very favorably to terrestrial equivalents. Johnston estimated it will eventually cost the company about $20 million to build and launch a 40-megawatt data center into orbit—still relatively small by terrestrial standards—compared to hundreds of millions of dollars to build a similar-sized facility on earth and purchase the land beneath it.
Operational costs are where Starcloud’s data center will shine, according to the company. In a Starcloud white paper, it estimates that a 40-megawatt data center on Earth will cost $140 million to power over a decade while one in outer space with a solar array would cost about $2 million.
There are a lot of assumptions built into Starcloud’s cost estimates, though, most notably one envisioning a decrease in the price of rocket launches. Currently, SpaceX charges customers around $70 million to book all of the capacity on a Falcon 9 rocket, but that rocket is too small to put Starcloud’s future 100-ton, 40-megawatt data center into orbit.
It may not be long before those launch prices come down and the capacity to send bigger, heavier objects into space goes way up. SpaceX has done multiple test launches of a gargantuan new heavy-lift rocket called Starship which will eventually allow it to bring bigger payloads to space.
While SpaceX dominates the commercial launch market, Bezos’ Blue Origin in January took an important step in introducing a significant new competitor to the market, when it successfully tested its Starship rival called New Glenn. Rob Meyerson, the former president of Blue Origin, believes more competition in the business will make concepts like orbital data centers more practical.
“You can rethink a lot of the science fiction business plans of the past with the new capacity that’s out there now,” said Meyerson, who is co-founder and CEO of Interlune, which plans to harvest Helium-3 from the lunar surface.
Startups like Starcloud are still going to need a lot more capital than they’ve currently raised to realize their long term visions. Johnston said he recently had a call with SoftBank, which has promised to pour billions of dollars into data center projects with OpenAI, and a representative from the Japanese investment firm asked him: “If you had unlimited resources, could you get a 5-gigawatt data center up within five years?”
“Well, if I had unlimited resources, then yes,” replied Johnston, who said the conversation wasn’t a formal fundraising call. (Starcloud is planning to raise another round after its first launch in August.)
SoftBank representatives didn’t respond to requests for comment.
For now, startups are sidestepping the launch cost issue by sending only the most diminutive data centers into orbit. Starcloud’s first data center going up in August will cost it $2.5 million, including a shared ride on a SpaceX rocket, Johnston said. It will consume a measly 1 kilowatt.
Meanwhile at Axiom, the company planning to launch its own orbital data centers on a partner’s communications satellites by the end of the year, Aspiotis said companies building space-based computing facilities will be lucky to scale to 100 kilowatts by 2030. (Axiom is also building a commercial space station.)
“It’s a decadal business play,” said Aspiotis.
With so little data center capacity expected in orbit in the coming years, don’t expect the world’s leading AI companies to shift their computing workloads into the skies anytime soon.
The most likely initial customers for the first orbital data centers are the ones that are already in space, executives and investors say. Companies, governments and researchers that use satellites to track the weather, missing planes and climate change could process data in orbit more quickly using space-based computers before sending it on to Earth. The U.S. military could do the same for data from the Golden Dome, a new space-based weapons system proposed by President Donald Trump that could take decades and hundreds of billions of dollars to build.
Europe is nosing around orbital data centers too. A few years ago, the European Commission was intrigued enough by their potential environmental benefits that it commissioned a feasibility assessment by a French-Italian space contractor, Thales Alenia Space. The study concluded that orbital data centers were indeed feasible.
Damien Dumestier, a lead researcher on the project, said the next steps in the study are to design a proof-of-concept 50-kilowatt orbital data center by 2030, and to figure out how to use robots to deploy a constellation of them. The European Space Agency is also looking at the possibility of constructing an entirely new rocket on par with Starship to bring the data centers to space, which would add far more complexity and cost to the effort.
If and when large orbital data centers do finally take flight, there’s a good chance large companies with capital and expertise in space could end up dominating the category. Two logical players are SpaceX and Amazon, which could add computing capacity to their Starlink and Project Kuiper satellites for delivering wireless internet to Earth. But skeptics believe there’s little demand for orbital data centers now.
“There’s no market now for a lot of this stuff,” said Clayton Swope, a former policy lead for Project Kuiper at Amazon, who is now at the Center for Strategic and International Studies. “In my mind, it’s very aspirational.”
In the meantime, believers in the future of putting data centers in space urge patience. Christopher Stott, a space veteran whose company Lonestar Data Holdings is building storage computers for the moon, compared the current skeptics of orbital data centers to his former Lockheed Martin colleagues who thought the internet was a passing phase in the 1990s.
These doubters “want to stay in the back of the cave,” Stott said, describing orbital data centers as “absolutely inevitable.”