EntityQ318654· pop 12· linked from 155 articlesAbell 520Sign in to savegalaxy clusterConnectionsluminous infrared galaxyEntitystarburst galaxyEntityinteracting galaxyEntitygalaxyEntitysupermassive black holeEntityradio galaxyEntitylenticular galaxyEntitygalaxy groupEntityunbarred spiral galaxyEntityBautz-Morgan classificationEntitylist of galaxy clustersEntitylight-yearEntityconstellationEntityX-rayEntityopticsEntityOrionEntitydigital object identifierEntitydark matterEntityparsecEntityquasarEntityCategoriesAbell objectsAbell richness class 3Dark matterGalaxy clustersOrion (constellation)