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 ...

A newly discovered neutron star is behaving so strangely that it may alter our understanding of the dense remains left behind ...

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

"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 ...

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 ...

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

NASA's James Webb Space Telescope, history's largest and most complex space observatory that serves thousands of astronomers ...

Since 2018, we've seen 1ES 1927+654 generate jets in real time and found it may have a lone white dwarf orbiting near the ...