A prototype checks in from orbit
Google's Suncatcher prototype space data center is online and communicating with Earth, according to TechCrunch. The satellite launched earlier this month on a SpaceX Falcon 9 rocket, alongside more than 100 other spacecraft.
It carries four of Google's Tensor Processing Units, or TPUs, and generates up to 1 kilowatt of electricity. TechCrunch reported that the spacecraft spent about three weeks in commissioning, during which engineers tested its subsystems, before it was ready to work.
A Google spokesperson told TechCrunch that the satellite was operating nominally.
The first prompt: a haiku
When ground engineers sent their first prompt this week, they asked the model pre-loaded on the satellite, Google DeepMind's Gemma 4, to write a haiku about being in space. According to TechCrunch, the reply read: "Blue marble below / Data streams in silent grace / Starlight feeds my core."
Google also asked the spacecraft to report on orbital conditions around it, which TechCrunch described as perhaps the more important test.
The power budget limits how much the satellite can do. A correction appended to the report says it has four TPUs onboard but can operate only one at a time. Because of the power demands, a chip can run for only about 20 minutes at once, which complicates communication between the spacecraft and the ground.
Testing radiation and heat
The test campaign will examine how the chips behave under thermal stress and in the space radiation environment. Google has tested its TPUs extensively in particle accelerators on Earth, TechCrunch reported, but now needs to see how radiation affects the hardware in actual orbit.
One concern is "bit flips," in which radiation changes a stored value in computer memory. That can corrupt data without setting off typical monitoring tools. Ground testing suggested radiation would have minimal impact on inference workloads, meaning running an already-trained model, and would be more of a problem for training one. The Google team can now check those findings against real conditions rather than a simulation.
What comes next and how rivals compare
If the TPUs on this spacecraft prove capable, Google plans to launch two more satellites with advanced chips in 2027. TechCrunch reported that those spacecraft will support higher power generation and demonstrate inter-satellite optical links.
Suncatcher is largely alone among space data center proposals in planning high-speed links between satellites to support coherent distributed workloads, according to the report. SpaceX's data centers are also expected to use laser links, but to orbit too far apart to share processing effectively. Starcloud and Cowboy Space expect to run inference loads on individual satellites.
Google's and SpaceX's plans are closely connected. Alphabet, Google's parent, holds a significant investment stake in SpaceX. Both companies would also need Starship, the still-in-development heavy-lift rocket, to become fully and rapidly reusable to launch orbital data centers. In a peer-reviewed analysis published earlier this month, Suncatcher researchers estimated that SpaceX would need to fly Starship 1,800 times to achieve the same learning-driven cost reductions it saw with earlier vehicles.
A long-term bet amid near-term pressure
TechCrunch called Suncatcher a classic Google moonshot, focused on infrastructure meant to be economical in the 2030s. Reaching that point may depend on how the rest of the company handles the pressures and opportunities of AI in the near term.
Alphabet's stock fell sharply this week after the company reported that efforts to put AI into its search business are hurting ad revenue growth, according to the outlet.
