Google's first space data-center satellite is now online

Google’s Suncatcher prototype — a proof-of-concept data center built to operate in orbit — is now exchanging signals with mission control. It rode to space earlier this month as one of more than 100 payloads packed onto a single SpaceX Falcon 9 launch. Four of Google’s own Tensor Processing Units (TPUs) sit onboard, drawing from a shared power budget that peaks around 1 kW; because that draw is so heavy, engineers can switch on only one chip at a time, for roughly 20 minutes per session, adding yet another wrinkle to the already tricky problem of talking to a satellite from the ground.

After roughly three weeks of commissioning its subsystems, the spacecraft was ready to work. Engineers sent their first prompt this week, asking Gemma 4 — the Google DeepMind model already loaded onto the craft — for a haiku capturing the experience of orbital flight; Google says it also tried the system on space-themed limericks and, more usefully, had the satellite report back on the orbital conditions around it. A company spokesperson told TechCrunch the satellite is operating nominally.

The real test ahead is how the TPUs hold up under thermal stress and space radiation, which can cause “bit flips” that silently corrupt stored data without tripping normal monitoring. Google has already run its TPUs through particle accelerators on Earth, and that ground testing suggested radiation would matter less for inference workloads than for training a model — but the company now gets to check that against reality rather than simulation. If the chips perform, Google plans to launch two more satellites with more advanced hardware in 2027, with higher power generation and laser links between spacecraft.

Those inter-satellite optical links are the project’s real differentiator: Suncatcher is largely alone in planning high-speed connections that let multiple satellites share a single distributed workload, while SpaceX’s own planned data centers, despite also using laser links, are expected to orbit too far apart to pool processing, and rivals like Starcloud and Cowboy Space are building toward inference on individual satellites instead. Google and SpaceX’s visions are intertwined — Alphabet holds a significant stake in SpaceX, and both need Starship, Elon Musk’s still-developing heavy-lift rocket, to become fully and rapidly reusable. A peer-reviewed analysis from Suncatcher researchers published earlier this month estimated that SpaceX would need 1,800 Starship flights to match the cost reductions its earlier vehicles achieved through repeated use.

Why it matters

Suncatcher is a long-horizon bet on 2030s space economics, but its researchers are making that case in the same week Alphabet’s own stock fell on signs that folding AI into search is hurting ad revenue growth — a reminder that Google’s moonshots still answer to how the rest of the company handles AI’s near-term pressures.