"We don't know if this object is the heaviest known neutron star, or the lightest known black hole, but either way it breaks a record."

New models could inform researchers working to get the very first picture of Sagittarius A*, the supermassive black hole at the Milky Way's center.

"The velocity of the discovered star is so high that it will inevitably leave the galaxy and never return."

If wormholes, bridges between regions in spacetime, are more than just a sci-fi fantasy, researchers may have a way to detect them.

Supermassive black holes and the galaxies where they reside grow in tandem, even "self-correcting" when one outpaces the other.

A new method lets researchers detect tones coming from a black hole, which also confirms Einstein's theory of general relativity.

Ever since the detection of gravitational waves, researchers have been searching for the bursts of light that may accompany the collisions that cause them.

New research could resolve a debate about the identity of bright objects at the center of certain galaxies.

Researchers have discovered the first evidence of a cloaked black hole in the early universe, existing just 850 million years after the Big Bang.

New research puts Einstein's theories of relativity to the test in a unique laboratory—the black hole at the center of the Milky Way.