Views of a massive galaxy cluster Abell 2256 have been captured by NASA’s Chandra X-ray Observatory, ESA’s XMM-Newton and ...

Within Abell 3667, two smaller galaxy clusters are actively merging together, evidenced by the glowing bridge (yellow) of stars stretching across the center of this image.

A rogue, middle-mass black hole has been spotted disrupting an orbiting star in the halo of a distant galaxy, and it's all thanks to the observing powers of the Hubble Space Telescope and Chandra ...

Astronomers may have uncovered the origins of the mysterious “little red dots,” some of the strangest galaxies seen in the ...

Astronomers have discovered a ghostly, million-light-year-long bridge of stars connecting two massive galaxies within the Abell 3667 cluster, 700 million light-years away. This glowing thread of ...

The black hole, spotted 5 billion light-years away in the Cosmic Horseshoe, could be the most massive ever found.

'Ultramassive' black hole the size of 36 billion suns found in distant galaxy The black hole spotted 5 billion light-years away in the Cosmic Horseshoe is also a whopping 10,000 times heavier than ...