Extremely Rare "Intermediate" Black Hole Found Orbiting Nearby Andromeda
The vast majority of black hollow we have observe are in two very different form . Either they are stellar size , count up to a few tens of times the mass of our Sun ; or they are supermassive , with a weight of millions , if not billions of metre our star . The intermediate - mass blackened holes remain an elusive class , sitting right in the midsection ....