International teams of astronomers monitoring a supermassive black hole in the heart of a distant galaxy have detected ...

This rare quasar with spiral arms could help astronomers understand how supermassive black holes feed and grow.

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

Researchers have found there are many more black holes in the universe than once thought. (Credit: WikiMedia Commons) Most ...

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

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

The interferometer team, led by Steve Ertel, associate astronomer of Steward Observatory, observed several phenomena ...

Active galactic nuclei are supermassive black holes at the center of certain galaxies. As matter falls into these black holes ...

Astronomers have captured the most detailed infrared images yet of an active galactic nucleus (AGN), using the Large ...

Caltech’s Katie Bouman explains how the Event Horizon Telescope Collaboration captured the first imager of the Sagittarius A* ...

A large international team of scientists observed a rare event in real time: a dramatic increase in radio emission and the ...