# New method using fast star may finally measure black hole spin

Astronomers have identified a high-speed star orbiting near a black hole whose motion could reveal the black hole's spin. The technique offers a way to measure a property that has been extremely difficult to observe directly. This could deepen understanding of black hole formation and evolution.

**Importance:** 3/5

## Sources

### Science
- [Nature](https://www.nature.com/articles/d41586-026-02607-0) — 2026-08-19