At cosmological scales, Albert Einstein’s theory of general relativity has given scientists an immensely accurate blueprint ...

Black holes are already among the most mysterious objects in the galaxy, and yet, one specific type has almost completely ...

Earth and our entire Milky Way galaxy may sit inside a mysterious giant hole which makes the cosmos expand faster here than in neighboring regions of the universe, astronomers say.

New research is shedding light on what researchers call "lite" intermediate-mass black holes, which are smaller, but still ...

How astronomers used gravitational lensing, a space-time trick predicted by Einstein, to detect a black hole measuring 30 billion times the mass of the sun.

Predicted by Einstein and dismissed as undetectable, gravitational waves were finally heard in 2016. Now, with observatories ...