Researchers have spent the past few years watching a black hole re-awaken roughly 300 million light-years away from Earth.

Although we know that supermassive black holes (millions of times the mass of our sun) lurk at the center of most galaxies, ...

"This rare event provides an opportunity for astronomers to observe a black hole's behavior in real time," said astronomer ...

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 ...

Primordial black holes are the earliest black holes thought to exist, and they vanished almost as fast as they came into ...

A distant galaxy that lay quiet for decades has suddenly stirred, lighting up in dramatic bursts that have caught astronomers ...

The Hubble Space Telescope has imaged a "200,000 light-year-long trail of newborn stars" that may have been left behind by a ...

Ansky, a once-dormant black hole, is now emitting powerful X-ray bursts, giving scientists a rare chance to study its ...

A mysterious black hole in a distant galaxy just woke up after decades of silence—and it’s putting on a cosmic light show! ESA’s XMM-Newton and other X-ray telescopes are capturing massive bursts of ...

Scientists have observed a previously inactive supermassive black hole producing regular, powerful X-ray eruptions that ...