Project Suncatcher Puts TPUs in Orbit

Suncatcher is a serious engineering experiment, but the hard problem is cooling and economics—not simply reaching orbit.

• –The prototype tests whether conventional TPU hardware can survive and operate reliably in space.
• –Vacuum cooling requires radiators and heat pipes, limiting compute density and increasing satellite mass.
• –Future clusters would use high-bandwidth laser links between satellites, creating a demanding networking challenge.
• –Orbital compute could reduce terrestrial power constraints, but launch, maintenance, radiation protection, and replacement costs remain substantial.
• –Google’s approach joins a growing race involving Starcloud and SpaceX to commercialize space-based AI infrastructure.