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Black Hole Merger Ripples Spacetime—and May Have Flashed in Gamma Rays
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
- If confirmed, this would be only the second multi-messenger cosmic event ever detected, after the landmark neutron star merger in 2017
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DT Editorial Team··4 min read·via phys.org