gravitational waves

It was an old idea of Stephen Hawking’s: Unseen “primordial” black holes might be the hidden dark matter. A new series of studies has shown how the theory can work.

New calculations show how hypothetical particles called gravitons would give rise to a special kind of noise.

Sometimes a mirror that reflects 99.9999% of light isn’t good enough.

A recent neutron star merger has defied astronomers’ expectations, leading them to question longstanding ideas about neutron stars and the supernovas that create them. “We have to go back to the drawing board.”

Researchers have confirmed rumors of a black hole collision that challenges our ideas about how black holes form.

How do black holes merge and make gravitational waves? Maybe with a little help from their friends.

Two independent papers vanquish lingering doubts about LIGO’s historic discovery of gravitational waves.

Cosmologists have predicted the existence of an oscillating signal that could distinguish between cosmic inflation and alternative theories of the universe’s birth.

Mathematicians have disproved the strong cosmic censorship conjecture. Their work answers one of the most important questions in the study of general relativity and changes the way we think about space-time.