There are monstrous objects at the heart of every large galaxy — black holes that are millions or even billions of times more massive than the sun. And when these “supermassive” black holes start to ...

In a groundbreaking discovery, NASA’s Chandra X-ray Observatory and other advanced telescopes have captured an extraordinary cosmic event: two massive galaxy clusters, PSZ2 G181.06+48.47, are not only ...

A new investigation of the structure of galaxy clusters has found it agrees with predictions made by the standard model of cosmology, the best explanation scientists have of the evolution of the ...