Question

how do black holes form

Answer 1

Stellar black holes form when the center of a very massive star collapses in upon itself. This collapse also causes a supernova, or an exploding star, that blasts part of the star into space. Scientists think supermassive black holes formed at the same time as the galaxy they are

Answer 2

Answer:

Black holes of stellar mass are expected to form when very massive stars collapse at the end of their life cycle. ... Matter that falls onto a black hole can form an external accretion disk heated by friction, forming some of the brightest objects in the universe.