# Exomoon detected around a brown dwarf

Astronomers have detected a planetary-mass exomoon orbiting a brown dwarf, a substellar companion to a star. The discovery, based on observational data, provides rare evidence of a moon-like body outside our solar system. It challenges current models of moon formation and expands our understanding of planetary systems.

**Importance:** 4/5

## Sources

### Science
- [Nature](https://www.nature.com/articles/s41586-026-10751-w) — 2026-07-22