Google puts its first TPUs into orbit next week - a survival test, not a data centre

Google's research blog said on 24 September that Project Suncatcher, its long-term moonshot on whether space could host machine-learning infrastructure, is about to launch its first prototype satellite. The mission rides SpaceX's Transporter-18 rideshare, was built with the satellite-imaging company Planet, and exists to gather in-orbit data on how Google's Tensor Processing Units handle "the physical stress of spaceflight and the radiation and thermal extremes of space."

What the page says

The case for orbit is power: in low Earth orbit a satellite sees near-constant sunlight and can generate up to eight times more solar power than on Earth. Before launch the team shook the satellite on all three axes to mimic a rocket ride, on which components can see 50 to 100 g, and the hardware held. Trillium TPUs were run under a proton beam at UC Davis's Crocker Nuclear Laboratory and, Google says, can survive a radiation dose greater than a five-year mission would deliver. Cooling is the open problem: with no airflow in a vacuum, heat leaves only by radiators, and the heat-pipe-and-radiator design has so far been tested only in a thermal vacuum chamber. Laser links between satellites are the next milestone, with two satellites planned for 2027.

The check

Google's page says "next week" and names no date; the 1 October launch from Vandenberg is reported by Space.com and others from the Transporter-18 manifest. The page does not say how many TPUs the satellite carries; "four" is coverage. And the page's own framing is the one to keep: "This first launch is about seeing what works, identifying points of failure" - a component test, not an orbital data centre.