New Type of Massive Black Holes, Searched for Years, Found in Neighboring Galaxy

Astrophysicists have long tried to find an intermediate-mass black hole (IMBH), a the long-awaited "missing link" between supermassive black holes many millions of times heavier than the Sun and stellar-mass ones that form after a massive star’s collapse. Their very existence was called into question and hotly discussed in the scientific community.