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 ...

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 ...

But researchers have used the James Webb Space Telescope, a collaboration of NASA and its European and Canadian space ...

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

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 ...

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 ...