Galaxy Clusters Abell 2731 Galaxy Cluster Abell 2731 Galaxy Cluster Abell 1060 region ARP 274 AGC 2344 AGC 2344 AGC 2744 AGC 2744 Draco triplet HCG-4 HCG 16 Hickson Compact Galaxy Group 21 Hickson’s Compact Galaxy Group 23 HCG 42 Hickson Compact Galaxy Group 88 HCG 88 annotated Hickson Compact Group 43 Hickson Compact Galaxy Group 90 Hickson Compact Galaxy Group 91 PGC 74796 PGC 74796
