Under an ambitious research initiative called Project Suncatcher, Google is sending a prototype satellite into low Earth orbit to figure out whether outer space is a practical spot to run massive AI workloads.
The initial launch is piggybacking on a SpaceX Transporter-18 rideshare mission, featuring hardware developed alongside satellite maker Planet.
Google’s main goal right now is straightforward i.e. to check whether its custom Tensor Processing Units, specifically its Trillium TPUs, can survive the brutal journey through Earth’s atmosphere and operate safely in the void of space.
If you are wondering why anyone would want to launch supercomputers into orbit, the answer comes down to pure energy. Earth-bound data centres require colossal amounts of electricity to train and run cutting-edge generative models. Out in low Earth orbit, satellite clusters can soak up near-constant, unhindered sunlight, generating up to eight times more solar power than identical solar panels placed on the ground.
A typical rocket launch exposes payloads to intense shaking and acceleration loads up to 10 times the force of gravity (10g). At a component level, individual TPU chips end up enduring extreme forces anywhere between 50g and 100g. Google engineers ran rigorous three-axis vibration testing on Earth to mimic the chaos of a launch, and surprisingly, the chips survived without snapping.
Once in orbit, cosmic radiation becomes the next major killer. Outside the protective boundary of our atmosphere, solar flares and cosmic rays bombard hardware, often triggering bitflips that corrupt data. To test for this, the Suncatcher team fired proton beams directly at Trillium chips inside UC Davis’s Crocker Nuclear Laboratory while running active AI tasks.
This mission is just step one. Google plans to launch a second mission in 2027 featuring two interconnected satellites. The long-term vision involves whole constellations of satellites, each carrying dozens of TPU chips.
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