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

Active galactic nuclei (AGN) are among the most energetic phenomena observed in the universe. These luminous objects, powered ...

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 ...

Supermassive black holes can have trillions of times more mass than the Sun, only exist in specific locations, and could ...

Using the aging Hubble Space Telescope, Achenbach spotted an unusual spiral galaxy quasar with a visible jet. This calls into ...

"This is how you solve the universe-breaking problem." ...

A distant supermassive black hole, the mysterious 1ES 1927+654, emits X-ray pulses unlike anything previously recorded, which ...