Google's Project Suncatcher Sends AI-Written Haiku From Orbit as Space Data Centres Take Shape

On 1 October, a small Google satellite went up on a SpaceX rideshare flight, and several weeks later it did something deliberately modest: it wrote a poem. Researchers asked the Gemma 4 generative AI model, running on the satellite's onboard processors, to compose a haiku about being in space. It came back to Earth as three lines: "Blue marble below / Data streams in silent grace / Starlight feeds my core."

Google is calling the transmission the 'Hello World' milestone for Project Suncatcher, its prototype for running AI data centres in orbit. The satellite was launched with the space technology firm Planet on the Transporter-18 rideshare mission and placed in orbit around Earth's poles. Travis Beals, a senior director at Google who leads the project, announced that "our chips have officially earned their space wings." A photo released by Google shows the joint team celebrating what it called the most complex and expensive haiku ever written.

The idea behind Suncatcher is to tap the near-constant solar energy available in orbit. Each satellite carries dozens of Google's Trillium Tensor Processing Units, or TPUs, the company's purpose-built AI chips. Google envisions linking many such satellites into compute constellations that would eventually function as large-scale data centres. It plans to test that configuration next year, after launching a second satellite.

Beals said that most people who hear the concept react by calling it crazy and assuming there must be a reason it can't work. His team's first task was to find that reason. "It turns out that it is possible," he said.

Getting there took heavy engineering. Google worked with Planet, which operates more than 200 imaging satellites, to stress-test the compute modules before launch. Engineers watched how the hardware handled liftoff, which subjects it to up to 100 times the force of gravity, and are now tracking whether it survives an orbital environment full of space junk, solar flares and radiation. Radiation can cause 'bit flips' that disrupt calculations, and ionising radiation can trigger 'silent data corruption' events that affect AI workloads. Google and Planet engineers managed to reproduce that phenomenon in lab testing. The satellite orbits at 800km on a pole-to-pole path chosen to maximise sun exposure, and engineers are now monitoring how it copes with radiation and thermal stress.

Heat is the particular problem. Space is cold, but with no air, heat does not drift away from components as it does on Earth. Suncatcher uses heat pipes, closed pumped fluid loops and flat panel radiators to draw heat off the TPUs and emit it into space as infrared radiation. The numbers are lopsided: TPUs can generate over 100,000 watts of heat per square metre, while the radiators dissipate only around 300 W/m2. As a result, the satellite has to pause every 15 minutes to let the radiators shed the excess.

Google is not first to put AI hardware in orbit. Private firm Starcloud launched a conventional NVIDIA H100 GPU last year that was able to run Gemma. Google argues that its specialised TPU design will scale more easily and efficiently. Orbital solar panels can collect five to eight times as much power as ground-based ones, since there is no atmosphere to weaken the light, and cheaper, faster launches are speeding deployment. Planet's director of systems engineering, Eric Stevens, said the approach lets engineers take advances from the commercial industry and send them to space immediately, rather than waiting through long design cycles to make them 'space rated'.

Others are circling the same territory. SpaceX CEO Elon Musk has talked up orbital data centres, posting that they are "looking pretty appealing right now," which the source links to concern that Democrats could impose restrictive planning and energy obligations on tech firms. Projects expected to move in coming years include Blue Origin's Project Sunrise, SpaceX's Starmind, and efforts from Orbital, Lonestar, Axiom Space, Cowboy Space Corporation, Satlyt and the European Space Agency's ASCEND. Some people have also raised environmental concerns about the idea.

Stevens said his first reaction was that the project seemed big even for Planet, but called it an experimental moonshot and an important first step toward moving data centres into orbit. "Everything seems too hard until someone tries it," he said. The next test is the second satellite, due next year, and whether linked satellites can work as one.