7 striking images of galaxy clusters captured by NASA

The Hubble Space Telescope captured this image, called the Hubble Ultra Deep Field, in 2004 by combining 800 images with a cumulative exposure of 11.3 days. 

NASA’s Chandra X-ray Observatory captured this view of the massive Perseus cluster, one of the largest-known galaxy clusters.

Caltech’s Cosmic Web Imager captured this image of quasar 1549+19 surrounded by hydrogen (blue) and a filament of gas flowing inward from bottom left

Galaxy cluster Abell 2256

This NASA/ESA Hubble Space Telescope image features the galaxy cluster eMACS J1823.1+7822.

X-ray: NASA/CXC/Xiamen Univ./C. Ge; Optical: DESI collaboration; Image Processing: NASA/CXC/SAO/N. Wolk

This graphic contains a map of the full sky and shows four of the hundreds of galaxy clusters that were analyzed to test whether the Universe is the same in all directions over large scales.

This graphic contains a map of the full sky and shows four of the hundreds of galaxy clusters that were analyzed to test whether the Universe is the same in all directions over large scales.