How far away are data centres in orbit?

The road so far

2 of 7 steps done, 2 in progress.

1. Done · 2022Commercial edge computer running in orbit

   An Amazon Snowcone device with 2 CPUs, 4 GB of memory and 14 TB of storage ran a machine-learning model on photos taken aboard the ISS, returning results in about three seconds. During the mission the team uploaded a 7 GB model update. AWS says the device relied on ground support, including remote diagnosis and updates over SSH, so this is not evidence of autonomous operation. [1]

2. Done · Nov 2025GPU flown on a small satellite (company-reported)

   Starcloud says Starcloud-1 launched in November 2025 carrying the first Nvidia H100 GPU in orbit. Its page says Starcloud-1 became the first satellite to run a version of Gemini in space and the first spacecraft to train an LLM, naming nanoGPT. The page gives no year for these runs, no independent benchmark and no measured compute figures. [2]

3. In progress · 11 Jan 2026Optical relay satellites with GPU modules in commissioning

   Kepler Communications launched 10 satellites of about 300 kg each on 11 January 2026. Each carries high-capacity optical terminals and multi-GPU compute modules with terabytes of storage. The release says the satellites will now begin commissioning. Published commissioning results were not found in the sources reviewed. [3]

4. In progress · Oct 2026Google prototype satellite in orbit

   Google's article dated 1 October 2026 says its Project Suncatcher prototype launched on Transporter-18, that the team has confirmed contact, and that the satellite is operating as expected. Google says it will gather in-orbit data on how its TPUs handle the physical stress of spaceflight over the coming weeks, so the TPU hardware has not yet been tested for spaceflight, radiation or thermal extremes. [5]

5. Not startedPublished mission record for an orbital compute node

   No reviewed source gives uptime, power draw, thermal margins, delivered compute or completed workloads over a sustained mission. A record of this kind would show whether an orbital node can deliver a service rather than run a test. [2][3][5]

6. Not startedMegawatt-class orbital compute nodes

   Axiom Space says orbital data centre capacity will grow from kilowatts to megawatts of processing power. It places this under a '2030 & Beyond' heading and gives no target figure or date. This is a plan, not a demonstrated system. [4]

7. Not started · 2050Gigawatt-scale orbital data centre capacity

   Thales Alenia Space's ASCEND study, funded by the European Commission under Horizon Europe, states an aim to deploy one gigawatt of space data centre capacity before 2050. The release describes this as an aim. It estimates that such infrastructure would need a launcher about ten times less emissive over its lifecycle to significantly reduce CO2 from digital processing and storage. [8]

Why it matters

Proponents say orbit avoids the need for cooling water and offers sunlight as a power source. Whether orbital facilities can compete with ground facilities depends on launch cost, heat rejection, radiation damage and the link to the ground. Early flights will show which uses make sense, such as processing data generated in orbit, and which do not.

What stands in the way

• Radiation damage at system level is not yet shown in orbit. Google says it will gather in-orbit data on how its TPUs handle spaceflight stress, and the TPUs have not yet been tested for radiation or thermal extremes.
• Heat must be radiated to space. In the 1 MW high-sunlight base case of a single preprint model, the system needs about 2,500 square metres of radiator area and about 5,640 square metres of beginning-of-life solar array.
• Launch and build cost must fall far below current levels. The same preprint's 1 MW case allows only US$250 to 1,000 per kg for combined launch and spacecraft build cost, which is 3.4 to 13.5 times below the public Falcon 9 dedicated launch price alone. A separate Google design study says launch to low-Earth orbit may reach about US$200 per kg by the mid-2030s. That is a learning-curve projection, not a current cost.
• No reviewed source gives uptime, delivered compute or cost per useful result for a commercial orbital compute service, so its economics cannot yet be checked.
• According to Thales Alenia Space's ASCEND release, a launcher about ten times less emissive over its lifecycle would be needed to significantly reduce CO2 from space data centres.

Signals to watch

• Published uptime, workloads completed and duration for Starcloud-1 or a successor, with the benchmark and conditions stated.
• Google's results from TPU tests for spaceflight, radiation and thermal conditions on the Suncatcher prototype.
• Commissioning results and measured link throughput from the Kepler relay satellites.
• Measured heat rejection and power duty cycle for a flown compute node through eclipse periods.
• Reported launch cost per kilogram for the vehicles intended to carry compute satellites.

Sources

1. company announcement
   How We Sent an AWS Snowcone into Orbit
   Amazon Web Services, 21 Jul 2022.
2. company announcement
   Starcloud-1
   Starcloud, Nov 2025.
3. company announcement
   Kepler Successfully Launches First Tranche of Optical Relay Satellites
   Kepler Communications, 11 Jan 2026.
4. company announcement
   Orbital Data Center
   Axiom Space, 2026.
5. company announcement
   Project Suncatcher prototype satellite launches
   Google, 1 Oct 2026.
6. preprint
   Towards a future space-based, highly scalable AI infrastructure system design
   Blaise Agüera y Arcas, Travis Beals, Maria Biggs et al.. arXiv, 22 Nov 2025.
7. preprint
   Orbital Data Centers: Spacecraft Constraints and Economic Viability
   Slava G. Turyshev. arXiv, 29 Apr 2026.
8. company announcement
   Thales Alenia Space reveals results of ASCEND feasibility study on space data centres
   Thales Alenia Space, 27 Jun 2024.

Last reviewed 21 Oct 2026.