The transfer of mass from the companion onto the black hole creates an accretion disk: a hot, rapidly rotating platter that emits a great deal of X-ray light. The first black hole discovered ...

UC Berkeley astronomers found a hidden black hole roaming far from the galaxy’s core. It may eventually merge with the ...

Scientists have detected radio signals from hot gas surrounding a supermassive black hole that existed 12.9 billion years ago, according to new research published in Nature Astronomy from an ...

A previously unknown black hole in our Milky Way galaxy has been revealed by a rare star explosion, scientists say. NASA's Swift space telescope spotted the rare X-ray nova that uncovered the ...