This data release's gallery highlights galaxy clusters, distant systems containing tens to thousands of individual galaxies and usually containing a single, large, dominant galaxy at the very center. The sample presented here is taken from the redMaPPer/v6.3 cluster catalog.
The diameter of each image cutout equals 400 kiloparsecs (more than 1.2 million light-years) at the redshift of the cluster. The clusters are sorted by increasing richness or dark matter halo mass, ranging between approximately 3x1015 solar masses (top, left-hand side of the page) to 1x1014 solar masses (bottom-right).
The object name below each thumbnail links to the Sky Viewer, and the horizontal white bar in the lower-right corner of each image represents 15 arcseconds.