LIGO-Virgo-KAGRA observatories detected gravitational waves from a binary black hole merger.
The event may produce gamma-ray flashes in November 2024.
This discovery builds on previous findings from 2017.
Briefing: A 100-solar-mass black hole merger ripples spacetime, and may flash in gamma rays
Strategic angle: An international team from China and Italy has reported a possible cosmic encore to the landmark 2017 multi-messenger discovery.