supermassive

But others, such as the Milky Way, would still have formed a 'supermassive' black hole despite never being a quasar.

Two types of black holes are found in the universe: stellar-mass black holes and 'supermassive' black holes.

An international team of astronomers have provided compelling evidence that we have a 'supermassive' black hole at the centre of our galaxy.

Although astronomers are surprised to find a blue disk of stars swirling around a 'supermassive' black hole, they also say the puzzling architecture may not be that unusual.

This discovery suggests that surveys of powerful 'supermassive' black holes have so far underestimated their numbers by at least a factor of two, and possibly by up to a factor of five.