Scientists detect first-of-its-kind 'intermediate-mass' black hole

An international research collaboration including Northwestern University astronomers has witnessed the birth of an "intermediate-mass" black hole. This is the first conclusive discovery of an intermediate-mass black hole, an object which has long eluded astronomers. The cosmic event, its energy detected on Earth in the form of gravitational waves, is the most massive black hole merger yet observed in gravitational waves. Two black holes likely collided and merged to create a more massive black hole.