Tagged: black holes

Cosmic zombies: Black holes can reanimate dead stars

Close encounters with medium-size black holes can reanimate dead stars, if only momentarily, a new study suggests. A team of astronomers performed computer simulations to determine what happens when a burned-out stellar corpse known as a white dwarf passes close to an intermediate-mass black hole...

How Stephen Hawking transformed our understanding of black holes

There’s a lot we still don’t know about black holes, but these light-gobbling behemoths would be even more mysterious if Stephen Hawking hadn’t plumbed their inky depths. For starters, the famed cosmologist, who died yesterday (March 14) at the age of 76, helped give more...

Is Dark Matter Made of Primordial Black Holes?

Astronomers studying the motions of galaxies and the character of the cosmic microwave background radiation came to realize in the last century that most of the matter in the universe was not visible. About 84% of the matter in the cosmos is dark matter, much...