Google sets first Project Suncatcher orbital test for next week

(SpaceEnergy) Google plans to launch its first Project Suncatcher prototype satellite next week to test AI computing hardware in orbit, advancing research into solar-powered space-based computing infrastructure.

The mission, developed with Planet, will fly on SpaceX's Transporter-18 rideshare mission and test Google's Tensor Processing Units under launch loads, radiation and the thermal extremes of low Earth orbit.

Google said ground testing subjected the satellite to launch-like vibration and its Trillium TPUs to proton radiation while running AI workloads. Initial results indicated the chips could withstand a total ionising dose exceeding the level expected during a five-year space mission.

The satellite will also test a thermal-management system combining heat pipes and radiators to dissipate heat from the processors in vacuum.

Project Suncatcher is exploring constellations of solar-powered satellites carrying AI processors. Google said satellites in suitable low Earth orbits could access near-continuous sunlight and generate up to eight times more solar power than equivalent terrestrial installations.

Future spacecraft are envisaged carrying dozens of TPUs and communicating through high-bandwidth optical links. Google plans a further 2027 orbital milestone involving two satellites to test its inter-satellite communications work.

The company cautioned that scalable orbital AI infrastructure remains a long-term research objective and said the initial mission is intended to identify technical successes and failure points rather than demonstrate a commercial system.