When the First Full SI Compute Cluster Runs in Orbit

Status

Watching As of Nov 8, 2026, single satellites carry data center chips in orbit, but no networked cluster of them is running a shared SI workload.

What this milestone means

SI chips already run in space, one satellite at a time. Starcloud-1 launched in November 2025 with an Nvidia H100, trained a small NanoGPT model on the works of Shakespeare and ran a version of Google's Gemini model in orbit. Google's Project Suncatcher prototype, built with Planet, reached orbit on October 1, 2026 aboard SpaceX's Transporter-18 with four Trillium TPUs, to test how the chips handle launch stress, radiation and temperature swings. China launched the first 12 satellites of its Three-Body Computing Constellation in May 2025, linked by lasers, with each satellite rated at 744 trillion operations per second.

A full compute cluster is a bigger step: many data center class accelerators spread across multiple satellites, joined by high-bandwidth optical links, working as one system on a large workload such as training or serving a model. Google's November 2025 design sketches clusters of 81 satellites flying within a 1 kilometer radius at about 650 kilometers altitude, with links targeting tens of terabits per second. Starcloud has described a far larger goal: a constellation of 88,000 satellites with a target of 20 gigawatts of orbital compute.

Why it matters

The main draw is power. Google says that in the right orbit a solar panel can be up to 8 times more productive than on Earth and can produce power nearly continuously. On the ground, the International Energy Agency projected in April 2025 that data center electricity demand would more than double by 2030 to around 945 terawatt hours, and new SI campuses compete for grid connections and permits.

The main obstacle is cost. Google's researchers estimate that launch prices may fall below $200 per kilogram by the mid-2030s, the point at which space data centers could become roughly comparable to ground facilities in cost per kilowatt per year. Sam Altman has criticized the idea, citing launch costs and the difficulty of maintenance in orbit, according to BGR.

What changes for people, builders and crypto

For people, the first visible uses are likely to be quiet ones, such as processing satellite imagery before it reaches the ground. The Next Web reported that Starcloud-1 is already processing radar data from Capella Space. Larger constellations also raise questions about orbital debris and night sky brightness that regulators will weigh.

For builders, orbit changes the engineering rules. Hardware must tolerate radiation, heat can leave only through radiators, nothing can be repaired by hand, and bandwidth to the ground is limited. Google's tests found its Trillium TPUs surprisingly radiation hard, with no hard failures at doses well above what a five-year mission would deliver.

For crypto, compute in orbit could become another place where energy-hungry workloads compete for cheap power. Starcloud has said Starcloud-2 will carry a crypto mining computer alongside its GPUs, an early test of whether such workloads make sense off the planet.

What to watch next

Starcloud said in August 2026 that Starcloud-2, with the largest commercial deployable radiator yet sent to space, would launch later in 2026. Google has said it will gather in-orbit data over the coming weeks and share more as the mission unfolds. SpaceX has targeted 2027 for the first satellites of its orbital data center program, with plans to scale further in 2028, after filing with the FCC in January 2026 for a constellation of up to 1 million satellites. In June 2026, SpaceX presented its first orbital data center satellite design, called AI1, with two large solar arrays and radiators and an initial average of about 120 kilowatts for computing. This page will flip to happened when a multi-satellite cluster of data center class accelerators is confirmed running a shared SI workload in orbit.

Signals so far

• May 14, 2025: China launched the first 12 laser-linked satellites of its Three-Body Computing Constellation, planned to reach 2,800 satellites. Live Science
• Nov 4, 2025: Google Research outlined Project Suncatcher, with clusters of 81 satellites flying within a 1 kilometer radius and optical links targeting tens of terabits per second. Google Research
• Mar 30, 2026: Starcloud said Starcloud-1, launched in November 2025 with an Nvidia H100, had trained a model in orbit, and set Starcloud-2 for October 2026. The Next Web
• Sep 30, 2026: SpaceX was reported to be targeting 2027 for the first satellites of its orbital data center program, after an FCC filing for up to 1 million satellites. BGR
• Oct 1, 2026: Google's first Suncatcher prototype, built with Planet and carrying four Trillium TPUs, reached orbit on SpaceX's Transporter-18. Google

Questions and answers

Sources

1. China is building a constellation of AI supercomputers in space, and just launched the first pieces Live Science · Jun 2, 2025
2. Exploring a space-based, scalable AI infrastructure system design Google Research · Nov 4, 2025
3. Electricity Demand from Data Centers Worldwide Set to More than Double by 2030: IEA American Public Power Association · Apr 11, 2025
4. Starcloud raises $170M at a $1.1B valuation to build data centres in orbit The Next Web · Mar 30, 2026
5. Starcloud Raises $250M Series A Extension at $2.3B Valuation Unite.AI · Aug 21, 2026
6. SpaceX Just Revealed That Orbital Data Centers Will Be Here Sooner Than You Think BGR · Sep 30, 2026
7. Our Project Suncatcher prototype satellite is in orbit Google · Oct 1, 2026
8. Google Launches Project Suncatcher AI Satellite With SpaceX iPhone in Canada · Oct 2, 2026