Google Project Suncatcher satellite

Google's Project Suncatcher MVP satellite launched October 1 on a SpaceX Falcon 9 Transporter-18 from Vandenberg, and Google confirmed it is operating as expected.

Post-launch reporting specified two constraints not detailed before launch: workloads run in roughly 15-minute Gemini inference bursts before passive radiator cooling, and HBM memory showed irregularities after approximately 2 krad(Si) in ground testing, identifying it as the weak point for longer missions despite Trillium chips surviving a simulated five-year radiation dose. BCG estimated a full 1 GW orbital cluster at roughly $30 billion.

Project Suncatcher MVP satellite launched on SpaceX Falcon 9 Transporter-18 from Vandenberg, California.

Reporting published September 28 added that Google stress-tested the Trillium TPUs aboard its Project Suncatcher satellite, set to launch October 1, finding the chips can survive a radiation total ionizing dose greater than a five-year space mission would deliver.

Thermal management in the vacuum of space remains an open engineering challenge. Coverage also stated the long-term rationale more explicitly: space offers room and abundant solar power for AI compute at scales impractical on Earth.

Google's Project Suncatcher MVP satellite is scheduled to launch October 1 aboard SpaceX's Transporter-18 rideshare mission, carrying four custom TPU AI accelerators for roughly one year of stress-testing in low Earth orbit.

Built using an existing Planet Labs spacecraft rather than a custom design, the refrigerator-sized prototype can answer simple AI queries from orbit. Results are meant to inform a 2027 follow-on with two laser-linked satellites, toward a constellation Google describes as operating like a single orbital data center.