Google space data centers moved a step closer to reality on October 1 as the company placed a refrigerator-size experimental satellite into low-Earth orbit to test whether artificial intelligence infrastructure can operate in space using near-constant sunlight for power.
Google space data centers test begins with Project Suncatcher
The mission, part of Project Suncatcher, is designed to evaluate how Google’s hardware performs in the extreme conditions of space. The company said the initial objective is to identify what works, uncover failure points, and apply those lessons to subsequent missions.
The satellite, which rode to orbit on a SpaceX rocket, was developed with satellite imagery company Planet. It carries four custom tensor processing units, or TPUs, with combined computing capability comparable to a single server in a terrestrial data center, according to reports. The chips will operate in 15-minute intervals to run tasks such as short Gemini AI queries, then shut down to cool.
Google ultimately envisions launching fleets of satellites, each hosting a dozen TPUs, linked by laser communications to one another and to ground stations. The clusters would function as space-based data centers.
Energy demand drives interest in orbital infrastructure
The concept of moving computing infrastructure off planet has drawn interest beyond Google as demand for AI computing grows and communities and power grids face constraints. The International Energy Agency estimates data centers consumed about 1.5 percent of global electricity in 2024 and that share could double by 2030.
In orbit, platforms can exploit nearly uninterrupted sunlight, which Google says can yield up to eight times more solar energy than ground-based installations.
“We have direct access to a wonderful renewable source of energy,” said Alexander Wyglinski, an electrical engineer at Worcester Polytechnic Institute, in an interview.
Cooling, radiation and debris pose key engineering hurdles
Operating high-performance chips in space presents significant thermal challenges. On Earth, data centers rely on water and fans, but fans do not function in microgravity and transporting large volumes of water is impractical, according to reports.
“In a satellite in particular, using more power to do the computations means dumping more heat into the confined environment inside of the satellite,” said Brandon Lucia, a computer engineer at Carnegie Mellon University, in a broadcast interview.
Google is testing a combination of pipes and radiators to shed heat and said it will refine designs based on in-orbit results. The company must also harden systems against radiation-induced errors and protect spacecraft from debris. As Wyglinski noted, satellites cannot use the same computer designs found on a typical desktop.
Next steps for Project Suncatcher
Despite the technical obstacles, the company remains optimistic and plans two additional satellite launches next year. It has also proposed clusters of more than 80 satellites to scale the concept if early tests succeed.
Google said the long-term aim is to make the service routine. If the approach works, users may one day submit a Gemini query without realizing the response was processed in orbit.
Related: Beaming sunlight to Earth
Separately, companies are exploring ways to increase solar availability on the ground. In July, the startup Reflect Orbital received federal approval to build and launch a demonstration satellite equipped with a mirror to direct sunlight to targeted locations on Earth.
For readers interested in other ambitious uses of technology in unexpected contexts, our review of the experimental performance project The 101 Plays Itself turns Los Angeles traffic into music explores an artist turning urban infrastructure into a musical instrument.