Scientists detect biggest ever merger of two massive black holes | Space | The Guardian

Scientists have detected about 300 black hole mergers from the gravitational waves they generate. Until now, the most massive merger known produced a black hole about 140 times the mass of the sun. The latest merger produced a black hole up to 265 times more massive than the sun.
— Read on www.theguardian.com/science/2025/jul/14/scientists-detect-biggest-ever-merger-of-two-massive-black-holes