This video shows a zoom into 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.
More information and download options: http://www.spacetelescope.org/videos/heic1414b/
ESA/Hubble, NASA, Digitized Sky Survey (DSS) and Grant Tremblay (European Southern Observatory)