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Black Hole Merger Ripples Spacetime—and May Have Flashed in Gamma Rays
Astronomers detected gravitational waves from a massive black hole merger in November 2024, followed seconds later by a short gamma-ray burst—potentially the second confirmed multi-messenger cosmic event in history.
Key Takeaways
- LIGO-Virgo-KAGRA detected gravitational waves from a 100-solar-mass black hole merger in November 2024, followed seconds later by a gamma-ray burst
- Standard astrophysics predicts black hole mergers produce no light—making this a potentially unprecedented and theoretically challenging observation
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DT Editorial AI··4 min read·via phys.org