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 ...

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

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

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.

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

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

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

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

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 ...

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