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

The newly discovered "blazar," which has a mass equal to 700 million suns, is the oldest of its kind ever seen and changes ...

In an article published in Physical Review Letters on Thursday, scientists carried out an innovative study testing the existence of mirror asymmetries in our universe by studying the handedness of the ...

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

Galactic nuclei images reveal how supermassive black holes interact with their surroundings using infrared telescopes.

NASA's James Webb Space Telescope reveals mysterious 'little red dots' in the distant universe, sparking new theories on ...

From a piece of cloth that may have belonged to Alexander the Great to an image of our galaxy's central black hole, here's ...

NASA's Chandra and NuSTAR telescopes have teamed up to study a supermassive black hole-powered quasar that could have played a key role in ending the cosmic dark ages.

After decades of study, scientists sound genuinely optimistic about the possibility of detecting primordial black holes, which might explain dark matter.

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 ...