project
Google's orbital compute program using TPU chips, with two prototype spacecraft planned for 2027.
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Google's first orbital TPU satellite can run its chips for only about 15 minutes before its radiators catch up, Ars Technica reports. Power is the easy part in orbit, so radiator area decides how many chips each satellite can carry.
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Google's orbital compute paper needs Starship to lift 370,000 tons to reach $200-a-kilogram launches, about 180 flights a year for a decade. Its first TPU in orbit will run in 15-minute bursts while Google tests whether a satellite can supply a kilowatt of steady power and keep the chip cool.
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Google's Project Suncatcher is launching four processors that can run Gemini for only 15 minutes before they must shut down to cool. Heat, launch mass and downlink stand between that payload and the orbital data centers SpaceX pitched when it went public in June.
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Google is flying four TPUs, roughly one server's worth of compute on a kilowatt of solar power, in Project Suncatcher's first orbital test. The satellite can show whether the chips survive heat and radiation in orbit, a smaller question than whether computing there is cheaper.
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Satlyt raised an $8 million seed round for software that runs AI models on satellites built by other companies. For operators, the part that has flown so far is onboard triage that cuts downlink costs, and the multi-satellite cloud in the founder's pitch has yet to be tried.
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Google launches its first Project Suncatcher satellite on October 1 with four TPUs on about 1kW of solar, roughly one data center server's worth of compute. It can show whether the chips stay cool in orbit, but the laser links any capacity case needs wait for a two-satellite test in 2027.
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Google's MVP satellite takes four TPUs and about 1 kW of solar power into orbit to test whether AI chips survive radiation and shed their own heat. Its results will show whether rebooting away bit flips and cooling through a radiator can carry into the constellations Google has already sketched.
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Google will fly four TPUs on a Planet-built Suncatcher satellite aboard SpaceX's Oct. 1 rideshare and track radiation and heat for a year. Lab tests have already covered launch loads and a five-year radiation dose, so cooling in a real vacuum is the least-proven part of the design.
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Google flies one server's worth of TPUs on 1 kilowatt of solar power on Oct. 1, its first hardware test for orbital AI data centers. The flight tests chip survival and cooling while SpaceX's and Blue Origin's far larger constellations still wait on FCC review.
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The $2.3B valuation sits on 25 people. The binding constraint is manifest space, and Starcloud-3 is designed around a vehicle its founder expects to reach commercially in 2028 or 2029.
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SpaceX, Blue Origin, Google and Starcloud have filings out for well over a million compute satellites. The deadline is a sales pitch; the paperwork is a read on ground power and permitting.
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