# Google launches first Suncatcher satellite to test AI chips in orbit

Digest AI · Hardware & Compute · published 2026-09-24T06:36:00Z · updated 2026-09-24T17:45:44Z

Canonical: https://digestai.news/story/google-launches-first-suncatcher-satellite-to-test-ai-chips-in-orbit

## Summary

Google’s **Project Suncatcher**, a research initiative exploring space-based AI infrastructure, sent its first prototype satellite into low Earth orbit aboard SpaceX’s **Transporter-18** mission on September 24, 2026. Developed with **Planet**, the satellite carries **Tensor Processing Units (TPUs)** to assess how they endure space’s physical stress—vibrations up to **10x Earth’s gravity**, radiation, and extreme temperatures—over a **five-year mission**. Google’s **Trillium TPUs** (v6e Cloud TPU) survived radiation doses exceeding **15 krad(Si)**, far beyond the expected **750 rad(Si)** for the mission, according to internal testing at UC Davis’s Crocker Nuclear Laboratory. The team also tested cooling systems in a thermal vacuum chamber, as traditional airflow won’t work in space’s vacuum. The satellite will validate designs for **heat pipes and radiators** before scaling up to a constellation of **81 satellites** by 2027, aiming for **1.6 Tbps** inter-satellite bandwidth via laser links—though precision in motion remains a hurdle.

Announced in **November 2025**, Project Suncatcher targets a **dawn–dusk sun-synchronous orbit** to maximize solar energy (up to **8x Earth’s productivity**). Google estimates launch costs could drop below **$200/kg by the mid-2030s**, potentially making space-based data centers cost-competitive with terrestrial ones. The **2027 milestone** will test two satellites flying in tandem, with **Planet** handling construction and deployment. The initiative builds on earlier benchmarks, including **800 Gbps** two-way transmission in lab tests.

## Key points

- Google’s first Suncatcher satellite launched on SpaceX’s Transporter-18, carrying TPUs for space stress tests
- Trillium TPUs survived radiation doses **15 krad(Si)**, far exceeding the **750 rad(Si)** five-year mission threshold
- Project aims for **81-satellite constellation by 2027**, with **1.6 Tbps** laser links and solar-powered efficiency

## Why it matters

If successful, space-based AI infrastructure could reduce energy costs and latency for global compute, but radiation resilience and laser precision remain unproven at scale.

## Sources

1. [Google’s Project Suncatcher Prototype Heads to Orbit for AI Chip Tests](https://unite.ai/googles-project-suncatcher-prototype-heads-to-orbit-for-ai-chip-tests) (unite.ai, 2026-09-24)
2. [Google's Suncatcher project aims to put AI data centers in orbit powered by solar energy](https://the-decoder.com/googles-suncatcher-project-aims-to-put-ai-data-centers-in-orbit-powered-by-solar-energy) (The Decoder, 2026-09-24)
3. [Google's first Suncatcher orbital data center test launches October 1](https://arstechnica.com/google/2026/09/googles-first-suncatcher-orbital-data-center-test-launches-october-1) (Ars Technica AI, 2026-09-24)
4. [Google is sending an AI satellite into space next week](https://theverge.com/tech/1000015/google-ai-satellite-space-project-suncatcher) (The Verge AI, 2026-09-24)
5. [Google’s Project Suncatcher to put ML infrastructure in space](https://blog.google/innovation-and-ai/models-and-research/google-research/google-project-suncatcher-facts) (blog.google, 2026-09-24, primary source)

## Cite

Digest AI, "Google launches first Suncatcher satellite to test AI chips in orbit", 24 September 2026, https://digestai.news/story/google-launches-first-suncatcher-satellite-to-test-ai-chips-in-orbit

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