Astronomers have discovered that a star system believed to host the closest black hole to Earth is actually comprised ... that rather than a triple system, HD 6819 is actually a "vampire" two ...

A 15-year search reveals the first evidence of a cosmic 'gravitational wave background ... black holes billions of times more massive than the sun requires a detector much larger than the size of ...

The closest known black hole may have been found a cosmic stone’s throw from Earth, just 1500 light years away. Called Gaia BH1, it is estimated to be about 10 times the mass of our sun.

But once they get a little bigger, perhaps the mass of Earth but the radius of a grape, things start to get interesting. Such a black hole would dramatically decrease the sun’s lifetime ...

Astronomers have discovered two new black holes that are the closest ones to Earth known ... and motion of billions of stars against the background sky. Tracking this stellar movement so precisely ...