The last decade has brought a new way to explore the universe. Gravitational wave astronomy, made possible by observatories ...

The latest discovery marks the first-ever "compelling clue" that a black hole may be present in the enigmatic galaxy, ...

While it's much smaller than the largest supermassive black holes detected, it's still a whopper considering how early in the history of the universe it appeared. An enormous black hole in the ...

While solitary black holes should be common, they are hard to find. The one in Sagittarius revealed itself when it passed in front of a dim background star, magnifying the star’s light and slowly ...

Astronomers are investigating the longest and most energetic bursts of X-rays seen from a newly awakened black hole. Watching this strange behavior unfold in real time offers a unique opportunity to ...