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 ...

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 ...

"What If is an epic exploration of possibilities. What If is a Webby Award-winning science web series that takes you on a ...

The first black hole that astronomers observed "turning off" just turned back on, releasing jets of hot gas into the cosmos.

In 2018, a galaxy about 270 million light-years away from Earth exhibited a major increase in activity. It quieted down again by 2020 -- only to dramatically increase its output again in 2023. At that ...

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

Black hole quantum effects are usually thought to be too small to have any observable signatures. This is indeed the case for ...

A supermassive black hole has been discovered by astronomers that's shooting a giant energy beam directly at Earth.

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

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