Project Suncatcher Leaves Lab: Google Sends Four TPUs into Orbit on October 1

A refrigerator-sized satellite, dubbed MVP, is set to launch from Vandenberg on SpaceX's Transporter-18 mission to test calculation, radiation and heat dissipation.

Google confirmed on September 24 that Project Suncatcher was moving from research to hardware validation. A first experimental computing satellite, soberly called MVP, is scheduled to take off on October 1 from Vandenberg Space Force Base in California, aboard the Transporter-18 ride-sharing mission of a Falcon 9, in partnership with Planet.

The spacecraft, which is comparable in size to a refrigerator, carries four in-house TPU accelerators — the same families of chips that drive and spin the models on the ground — powered by about 1 kW of solar panels, and will run AI workloads including Gemini. The goal is to measure real-world computational behavior, radiation tolerance, and thermal management in low Earth orbit, ahead of a two-satellite optical array experiment planned for 2027.

Heat dissipation is precisely the central constraint: without air, there is no convection, and the heat must pass from the processors to the radiators via interface materials and heat pipes. The initial system will therefore only be able to use the TPUs in limited slots, while the thermal loop is restored. The basic idea remains the energy bet: in orbit, the almost permanent sunlight makes it possible to produce much more solar electricity than on the ground.