Strange x-ray pulses hint at a surprisingly long-lived white dwarf orbiting precariously close to a supermassive black hole ...

The newly discovered "blazar," which has a mass equal to 700 million suns, is the oldest of its kind ever seen and changes ...

Astronomers have detected the most ancient blazar ever observed, originating from the early universe and emitting a beam of ...

Supermassive black holes with powerful jets of high-energy particles, pointing directly at Earth are called blazars.

Astronomers have uncovered the most distant blazar ever discovered, a supermassive black hole with a mass of 700 million suns ...

Astronomers discover a supermassive black hole, weighing 700 million suns, firing a giant energy beam directly at Earth from ...

A strange black hole is making scientists scratch their heads.

A black hole infamous for strange features has once again baffled astronomers, this time with rapid X-ray flashes. What could ...

The dense stellar remnant would, if confirmed, be the closest known object to any black hole, according to preliminary ...

In 2018, a galaxy about 270 million light-years away from Earth exhibited a major increase in activity. It quieted down again ...

Astronomers detected X-ray flashes from the black hole that increased in frequency from one every 18 minutes to one every seven minutes.

Researchers in South Korea are developing a constellation of satellites that could reveal what goes on in the vicinity of ...