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

"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.

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

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 quasi-periodic eruptions of X-rays from a black hole 300 million light-years away are unlike any researchers have ever ...

Learn why a black hole is becoming active and why experts still can't explain the source of its regular, periodic pattern of ...

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

After years of observation, researchers concluded that the sudden changes in the galaxy were likely caused by its black hole ...

A distant massive black hole erupted to life, releasing record-breaking X-ray flares in a stunning cosmic event.