... The Perseus Cluster of Galaxies . ... Here is one of the largest objects that anyone will ever see on the sky. Each of these fuzzy blobs is a galaxy, together making up the Perseus Cluster, one of the closest clusters of galaxies. The cluster is seen through a foreground of faint stars in our own Milky Way Galaxy. ... Circles in the Sky . ... The M81 Galaxy Group Through the Integrated Flux Nebula . ... Large galaxies and faint nebula highlight this deep image of the M81 Group of galaxies. ...