This video pans across a new NASA/ESA Hubble Space Telescope image of two galaxies from the cluster SDSS J1531+3414. The two galaxies have been found to be merging into one and a "chain" of young stellar superclusters are seen winding around the galaxies’ nuclei. The galaxies are surrounded by an egg-shaped blue ring caused by the immense gravity of the cluster bending light from other galaxies beyond it.
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NASA, ESA/Hubble and Grant Tremblay (European Southern Observatory)