galaxy MS 1512-cB58, at z=2.724 False clusters Sometimes clusters are put forward that are not genuine clusters or superclusters. Through the researching of member positions, distances, peculiar velocities, and binding mass, former clusters are sometimes found to be the product of a chance line-of-sight superposition. See also Lists of astronomical objects Galaxy cluster Galaxy group Illustris project List of galaxies Lists of groups and clusters Catalogue of Galaxies and of Clusters of Galaxies Hickson Compact Group List of Abell clusters List of galaxy superclusters Lyons Groups of Galaxies Virgo Supercluster References External links ; Abell's 1957 cluster list Galaxy clusters Galaxy groups and clusters