Google plans first test of AI chips in space under Project Suncatcher

Alphabet's Google announced on Thursday its intention to conduct the inaugural in-orbit test of Project Suncatcher, a research initiative aimed at investigating the feasibility of establishing large-scale AI computing infrastructure in space. This project aligns with a growing trend among companies like SpaceX and Starcloud, who are contemplating the deployment of data centers in low Earth orbit to leverage continuous sunlight for powering AI computations and circumventing terrestrial limitations on electricity availability.

The upcoming mission, slated for launch on SpaceX's upcoming Transporter-18 rideshare launch in collaboration with satellite firm Planet Labs, will scrutinize how Google's AI hardware, specifically Tensor Processing Units (TPUs), fares under the rigors of launch forces, cosmic radiation, and extreme temperatures prevalent in low Earth orbit.

Post-launch, the prototype satellite carrying Google TPUs will orbit low Earth orbit to evaluate the capability of these AI chips to function reliably in the hostile space environment. While Google has previously subjected its TPUs to rigorous testing in AI workloads within a University of California, Davis facility, orbital testing is deemed essential to comprehensively understand the hardware's performance in actual space conditions.

Radiation present in space poses a significant risk, capable of disrupting or degrading electronic components, including inducing data errors termed as bit flips. To address this, Google will evaluate its cooling solution for the energy-intensive TPUs, operating in the vacuum of space where conventional airflow cooling is impractical.

The proposed design integrates heat pipes with radiators to dissipate heat effectively. However, industry experts caution that realizing a commercially viable concept remains years away due to high launch costs, intricate engineering challenges, and bottlenecks in satellite manufacturing.

The primary objective of the initial Suncatcher mission is to amass data in orbit and pinpoint potential failure points, rather than showcasing a fully operational orbital data center. Google's vision extends beyond this initial launch, with plans to dispatch two satellites in 2027 to assess the high-bandwidth laser links necessary to interconnect future computing clusters in space.