When Giants Collide: The Universe’s Heaviest Black Hole Merger

Astronomers working with LIGO, Virgo, and KAGRA have caught the most massive black hole merger ever recorded: event GW231123, where two giant black holes — about 100 and 140 times the mass of our Sun — morphed into a cosmic behemoth weighing 225 solar masses. Both original black holes were spinning so fast — roughly […]