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

The James Webb Space Telescope has captured a mid-infrared picture of Sagittarius A*, filling in a long-standing gap in ...

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

NASA's Chandra and NuSTAR telescopes have teamed up to study a supermassive black hole-powered quasar that could have played ...

Galactic nuclei images reveal how supermassive black holes interact with their surroundings using infrared telescopes.

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

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

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

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

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

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

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 ...