The one in Sagittarius revealed itself when it passed in front of a dim background star, magnifying the star’s light and slowly shifting its position due to the black hole’s gravity.

HERE’S THE BACKGROUND — The team behind the initial discovery was originally observing a binary star system called HR 6819 when they began noticing evidence for a third, invisible object.

Astronomers have found one huge star eating another, but the smaller star is predicted to eventually become a black hole and go on to feed off its companion. Close. Advertisement.

On the outskirts of the Milky Way, some 14,800 light-years away, one little star orbits a black hole closer than any other star we know about. The white dwarf orbits a stellar-mass black hole once ...

Astronomers at the University of Hawaii uncovered black hole events so packed with energy, they were the biggest explosions seen since the Big Bang.

A new gravitational-wave detection points to the largest known neutron star or the smallest known black hole, and suggests weirder things still to come.