The detection confirms a key prediction of Einstein's theory of general relativity.
A new analysis of Hubble data has revealed the best candidate yet for a type of black hole that nobody has seen yet, and it gave itself away by tearing a star apart.
For years, scientists debated whether the glow was a telltale sign of dark matter. A new study refutes that theory, but that only deepens the mystery.
They may provide evidence for a new form of black hole.
Four and a half billion light years from Earth, a black hole is lost and throwing a tantrum.