Alphabet sends AI chips to orbit in first Project Suncatcher test

Alphabet's Thursday launch marks a shift from ground-based testing to actual orbital conditions. The company had already run its TPUs on AI workloads at a facility at the University of California at Davis, but does not yet know how the chips will perform in the challenging conditions of low Earth orbit. Low Earth orbit offers near-constant sunlight, which Alphabet says can generate up to eight times more solar power than on Earth — a potential answer to the data center backlash on the ground that SpaceX has cited as motivation.

The two companies are unusually intertwined for competitors in AI: Alphabet is a significant investor in SpaceX, which went public in June in a record IPO, and Alphabet's stake is currently valued at over $82 billion. SpaceX, led by Elon Musk, has separately announced plans to build and launch its own orbital data centers — swarms of satellites developed in Redmond, Washington, equipped with graphics processing units and solar arrays it plans to produce with Tesla.

Whether orbital data centers become viable hinges on whether chips can survive extreme temperatures and radiation, and whether launch costs and capacity can support them. For Alphabet, the test also carries a strategic edge: if its TPUs work in orbit, it would validate its own silicon for a market where it now competes with its own investee. The outcome may not be clear until later missions confirm whether in-orbit AI workloads can run reliably at scale.