It was subsequently shown that the original Abell cluster is actually comprised of two independent galaxy clusters – a foreground group around 2.3 billion light-years from Earth, and another group at the greater distance of about 5.4 billion light-years from our planet. The more distant galaxy cluster, included in the Massive Cluster Survey as MCS J0358.8-2955, is central in this image. The two galaxy groups are thought to have masses equivalent to around 30 trillion and 120 trillion times the mass of the Sun, respectively. Both of the two largest galaxies at the center of this image are part of MCS J0358.8-2955; the smaller galaxies you see here, however, are a mixture of the two groups within Abell 3192.
