Google says space data centers need 1,800 Starship launches to make financial sense

Space data centers sound great, but Google says SpaceX must launch Starship 1,800 times before the math actually works.

Google launched its first test chip into orbit today aboard a SpaceX rocket. The mission tests whether a Google Tensor Processing Unit (TPU) can survive radiation, stay cool, and process AI workloads in space. But according to a Google paper published in Joule, offloading data centers to orbit requires launch costs to drop to $200 per kilogram by 2035. Getting there requires SpaceX's Starship rocket to haul 370,000 tons of payload across 1,800 launches over the next decade.

Why it matters: Starship has never flown more than five times in a single year. While Google's tests show its chips can handle standard AI inference in space, building its planned 81-satellite compute cluster depends entirely on SpaceX achieving a historic launch pace.

Here's the gist of Google's space trial:

• The prototype fires up its TPU in 15-minute bursts to prevent overheating.
• Next year's follow-up test will link two compute satellites via laser communications.
• Space radiation causes about one logic error per million operations—fine for running models, but risky for long training runs.

Until Starship flies every couple of days, orbital AI stays down to Earth.