The powerful merger, designated GW231123, produced an extremely large black hole about 225 times the mass of our Sun.

A puzzling gravitational wave was detected, and astronomers have determined that it comes from a record-breaking black hole ...

Collaboration has detected the merger of the most massive black holes ever observed with gravitational waves using the LIGO ...

Gravitational waves spotted by LIGO reveal two black holes, 140 and 100 times the mass of the sun, merged to become a 225 solar mass behemoth.