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

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

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

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

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

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

The black hole at the heart of galaxy SDSS1335+0728, located 300 million light-years away, was quiet for decades as it consumed little matter and was in a dormant state. But recently it suddenly lit ...

Black holes are fundamental to the structure of galaxies and critical in our understanding of gravity, space, and time. A ...

Using the mathematics of Einstein's 1915 theory of gravity, called general relativity, scientists can model the interior of a black hole. The problem is that, when they do this, general relativity ...

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

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 ...