Google's Project Suncatcher Set to Launch First Orbital AI Test Satellite on October 1

Project Suncatcher was announced last year as a Google “moonshot” effort to design orbital AI data centers. Ars Technica reported that AI boosters including Elon Musk and Jeff Bezos have pitched space-based data centers as an alternative to contentious terrestrial facilities. On Earth, a data center would run thousands of such chips and consume enormous amounts of power, one reason Google is exploring solar-powered AI hardware in space.

MVP is not a full data center. Engadget reported that its four TPUs combined offer the power of a single server in a data center. The satellite's solar panels supply about one kilowatt, enough to power a microwave or a hair dryer, according to The New York Times, as cited by Ars Technica. Google says that is enough to test the hardware against the harsh conditions of space.

Google did not build the spacecraft from scratch. While the AI hardware is Google's, the satellite comes from Planet Labs, a satellite imagery firm. Ars Technica reported that Google initially planned to launch two custom satellites in 2027 but wanted to accelerate its efforts, so it integrated its chips into a satellite Planet Labs had already built for an early test. Engadget reported the MVP launch is aboard a SpaceX Falcon 9.

Google plans to let the satellite answer simple AI queries for a year, though Engadget reported it will orbit Earth for six years before burning up during descent into the atmosphere. The chips have undergone testing to simulate the space environment, including exposure to large amounts of radiation at Crocker Nuclear Laboratory. Radiation can cause “bit flips,” flipping binary code from one to zero or vice versa. Google's solution is to restart the chips when they act up, Engadget reported. A proprietary cooling system uses layers of conductive material to expel heat into space, but it works for only about 15 minutes before the chips must be turned off to cool.

James Manyika, Google's senior vice president for research, technology and society, urged the public to temper expectations. “We don't expect, to be perfectly frank, that we'll have anything usefully operational in the next few years,” he said, according to Engadget.

Brandon Lucia, a professor of electrical and computer engineering at Carnegie Mellon University, told The New York Times that expanding from one satellite to a vast network that operates like a giant data center will take years and enormous funds. “If you do this on a large scale, there are additional engineering problems,” he said, according to Engadget.

Those problems include cosmic rays, which Engadget described as physical particles traveling quickly through space that could punch through and melt semiconductor junctions. Launching equipment is also expensive: a single Falcon 9 launch costs around $74 million. Scaling up the cooling system is difficult because standard heat dissipation does not work in space, and powering thousands of chips would require a far larger solar array than the one on MVP.

Google nonetheless plans to scale the project. Engadget reported that it wants to launch two similar satellites next year, with an eventual goal of 80 satellites flying in close formation to better process AI queries. The company is also looking into building a much larger satellite, around the size of a football field. Google has not indicated how much money it is putting into the effort.