Einstein believed that black holes didn't really exist. But they do: that much we know. We don't know much else about them.

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

A massive black hole at the heart of a galaxy in the Virgo constellation is waking up, shooting out intense X-ray flares at ...

"This pushes our models to their limits and challenges our existing ideas about how these X-ray flashes are being generated." ...

Whether a galactic environment has the right conditions for habitable planets to form could depend on how the black hole in ...

This week, researchers reported a brain circuit linked to the intensity of political behavior. Microbiologists found that the ...

Last summer, researchers announced the first ever detection of a supermassive black hole being spotted as it awoke. The ...

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

The black hole at the heart of galaxy SDSS1335+0728, located 300 million light-years away, was quiet for decades as it ...

A mysterious black hole in a distant galaxy just woke up after decades of silence—and it’s putting on a cosmic light show!

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

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 ...