The newly discovered "blazar," which has a mass equal to 700 million suns, is the oldest of its kind ever seen and changes what we know about the early universe.

For years, astronomers have been perplexed by this particular supermassive black hole, a behemoth as large as a million suns in a distant galaxy. In 2018, astronomers observed that the black hole ...

A tiny black hole would dive right into the supermassive black hole, and any normal star would quickly be torn apart by the behemoth's overwhelming gravitational pull. Instead, only a white dwarf ...

A black hole infamous for strange features has once again baffled astronomers, this time with rapid X-ray flashes. What could they be?