These objects range in size from 'stellar black holes' only a few times the mass of our sun to truly vast monsters called 'supermassive black holes' with millions or billions of stellar masses.
A black hole of this mass would be about the size of an atomic nucleus. Physicists have speculated that, when the universe was very young and hot, copious numbers of miniature black holes may have ...
The size and spin of black holes can reveal important information about how and where they formed, according to new research. The study, led by scientists at Cardiff University, tests the idea ...