Google activated one of four onboard Tensor Processing Units on the Project Suncatcher prototype satellite to run DeepMind's Gemma 4 model. Built alongside Planet, the spacecraft must overcome strict orbital limits, generating only enough power to operate a single chip for roughly 20 minutes during ground contact windows. Future expansions hinge on how well the hardware manages cosmic radiation and heat dissipation using onboard radiators and heat pipes.
Key points
Initial orbital testing is focused on monitoring hardware durability against thermal heat…: Initial orbital testing is focused on monitoring hardware durability against thermal heat dissipation and radiation-induced bit flips.
Future multi-satellite systems will rely on laser links to divide and process artificial…: Future multi-satellite systems will rely on laser links to divide and process artificial intelligence workloads across orbit.
Long-term commercial viability requires approximately 1,800 SpaceX Starship flights to re…: Long-term commercial viability requires approximately 1,800 SpaceX Starship flights to reduce launch costs enough for 2030s feasibility.
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Google has run its first AI prompt in space. Its Project Suncatcher prototype satellite, sent to orbit earlier this month, received a command from the ground, powered on one of its Tensor Processing Units (TPUs), ran the prompt and returned a complete answer. The task was a haiku written from the perspective of a TPU orbiting Earth, with the world spinning beneath it.
Sundar Pichai called it a “hello world” milestone, borrowing the phrase programmers use for the first test of any new system. The model behind the poem was Google DeepMind’s Gemma 4, loaded onto the satellite before it left the ground, and it wrote about the blue planet below and starlight feeding its core. Engineers also had the satellite report on conditions around it, and Google says the spacecraft is working as expected.
Power and radiation are the real tests for Google’s TPUs in orbit
There are four TPUs on board, but the satellite generates up to 1 kW, which is enough to run just one chip at a time for about 20 minutes. Those short windows also…
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