A little-known chapter of the Hubble Space Telescope’s history is a reminder of the risks of looking at the sun ...

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

Using the Cerro Tololo Inter-American Observatory (CTIO), an international team of astronomers have performed deep optical ...

"For such a faint and unknown target, we were not sure if we would get any data at all — but the strategy worked." ...

Researchers found far more hidden black holes than previously known, indicating plenty of behemoths lurking in thick clouds ...

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

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

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

In the years following the launch of NASA's Hubble Space Telescope, astronomers have tallied over 1 trillion galaxies in the universe. But only one galaxy stands out as the most important nearby ...

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

A group of astronomers have made history by capturing an image of a record number of stars from a time when the universe was ...