The Californian startup Aetherflux has announced which will launch its first data center satellite in the first quarter of 2027. It is the initial node of a constellation that the company has named “Galactic Brain”, designed to offer in-orbit computing capacity powered by continuous solar energy.
The underlying promise. Aetherflux presents an alternative to the years of construction that terrestrial data centers require. According to Baiju Bhatt, company founder and co-founder of the financial firm Robinhood, “the race toward artificial general intelligence is fundamentally a race for computing power and, by extension, energy.” The company is committed to placing sunlight next to silicon and completely bypassing the electrical grid.
How the project works. The Galactic Brain satellites will operate in low Earth orbit, taking advantage of solar radiation 24 hours a day, something impossible on land. Advanced thermal systems would eliminate the limitations faced by terrestrial data centers, which require large amounts of water and electricity for cooling. In addition, the constellation fits within Aetherflux’s initial plans: transmitting energy from space to Earth using infrared lasers.
The competition is already underway. Aetherflux is not alone in this bet. Google presented in November your Suncatcher projecta plan to launch AI chips into space on solar-powered satellites. Jeff Bezos too expressed his optimism on large data centers operating in space in the next decade or two, a goal that Blue Origin has been working on for more than a year.
SpaceX also works in use Starlink satellites for computing loads of AI. Musk himself wrote in
The real obstacles. Although launch costs have decreased considerably, they remain prohibitive. According to recent estimateslaunching a kilogram with SpaceX’s Falcon Heavy costs around $1,400. Google calculate that if these costs drop to about $200 per kilogram by 2030, as projected, the expense of establishing and operating space data centers would be comparable to that of terrestrial facilities. In addition, the chips will have to withstand more intense radiation and avoid collisions in an increasingly congested orbit.
The urgency. Big tech is colliding with physical limits on Earth. From 2023, dozens of data center projects have been blocked or delayed in the United States due to local opposition over electricity consumption, water use and associated pollution. According to the consulting firm CBRElimitations in electricity generation have become the main inhibitor of data center growth around the world.
The Aetherflux Calendar. The company, founded in 2024 and which has raised $60 million in financing, plans to first demonstrate the feasibility of transmitting space energy through a satellite that will launch in 2026. If all goes according to plan, the first Galactic Brain node will arrive in 2027. The company anticipates launching about 30 satellites at a time on a SpaceX Falcon 9 or equivalent, although if Starship becomes an option, they could orbit more than 100 data center satellites in a single launch.
The long term strategy. Aetherflux hasn’t revealed pricing yet, but promise Multi-gigabit bandwidth with near-constant uptime. Their approach is to continually release new hardware and quickly integrate the latest architectures. Older systems would run lower priority tasks until the life of the high-end GPUs were exhausted, which under high utilization and radiation might not last more than a few years.
Cover image | İsmail Enes Ayhan and NASA
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