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

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

"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 ...

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 ...

Scientists have uncovered the strongest evidence yet for the existence of elusive intermediate-mass black holes (IMBHs), long ...

The UK has accused Vladimir Putin of dragging his feet on a Ukraine ceasefire at a meeting of allies - at which more than £18bn in aid was pledged to Kyiv. Meanwhile, Donald Trump's envoy has ...