Google's First Orbital Data Center Prototype Comes Online and Writes a Haiku

Google's Suncatcher prototype space data center is online and communicating with the ground after launching earlier this month aboard a SpaceX Falcon 9 rocket. The satellite is intended to pave the way for future networks of close-flying satellites performing large inference workloads in orbit.

The spacecraft launched alongside more than 100 other satellites and completed a commissioning process over roughly three weeks that tested its subsystems before it was ready to work. It carries a single Google Tensor Processing Unit and generates up to 1 kW of electricity. The power demands of the TPU mean it can only turn on for about twenty minutes at a time, complicating the already difficult task of space-to-ground communications.

When engineers on the ground sent their first prompt this week, they asked the model pre-loaded onto the satellite, Google DeepMind's Gemma 4, to write a haiku about being in space. The model responded: "Blue marble below, Data streams in silent grace, Starlight feeds my core." Google also tested the model with space-themed limericks and asked the spacecraft to report on the orbital conditions around it. A spokesperson said the satellite was operating nominally.

The ongoing test campaign will examine how the chips perform under thermal stress and in the space radiation environment. Google has extensively tested its TPUs in particle accelerators on Earth but now needs to see how radiation affects the hardware in orbit. Radiation can cause bit flips, altering a stored value in computer memory and corrupting data without triggering typical monitoring tools. Testing on the ground suggested the impact of radiation would be minimal for inference workloads and more of a problem for training a model, and the team will now assess those dynamics in reality rather than simulation.

Google said that if the TPU aboard this spacecraft proves capable, the next step will be launching two more satellites equipped with the advanced chips in 2027. Those spacecraft will support higher power generation and demonstrate inter-satellite optical links. Google's Starcloud project is planning on high-speed links between satellites to support coherent distributed workloads.

Google and SpaceX's visions are closely linked. Alphabet, Google's parent company, holds a significant investment stake in SpaceX. To launch their orbital data centers, both companies will require Starship, the still-in-development heavy-lift rocket, to be fully and rapidly reusable. In a peer-reviewed analysis published earlier this month, Suncatcher researchers estimated that SpaceX would need to fly Starship 1,800 times to achieve the same learning-driven cost reductions it saw with its earlier vehicles.

Suncatcher is a Google moonshot focused on designing infrastructure that will be economical in the 2030s. Getting there may depend on how the rest of the company responds to the pressures and opportunities of AI in the near term. Alphabet saw its stock plunge this week after reporting that efforts to insert AI into its search businesses are hurting ad revenue growth.

What to watch next is the performance of the onboard TPU under thermal stress and radiation during the ongoing test campaign, and whether that performance clears the way for the planned 2027 launch of two more satellites carrying advanced chips and demonstrating inter-satellite optical links.