It might just be possible to see a light flash too when black holes merge
Black hole merger events are some of the most energetic, fearsomely energetic events in all the cosmos. When black holes merge, they’re entirely invisible, the only evidence of the cataclysm some faint whisper of gravitational waves. Until now. LIGO, the gravitational-wave detector extraordinaire, has been spitting black hole mergers since 2015, racking up a few …
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