# City Labs achieves first commercial nuclear power in space

Miami-based City Labs has successfully demonstrated the first commercial nuclear power source in space. The breakthrough proves the viability of private-sector nuclear energy for spacecraft, potentially enabling longer missions beyond solar-powered limits. This milestone could accelerate commercial deep-space exploration and reduce dependence on solar panels.

**Importance:** 4/5

## Sources

### Technology
- [Ars Technica](https://arstechnica.com/space/2026/07/miami-based-city-labs-achieves-a-first-for-commercial-nuclear-power-in-space/) — Wed, 08 Jul 2026 17:26:44 +0000