Panning across the galaxy cluster A1725N

This galaxy cluster, A1758N, is about 3.2 billion light-years away. As can be seen in this pan, the cluster does not consist of a single source but of two separate structures named A1758NW and A1758NE. There appear to be disturbances within each of Abell 1758 North’s sub-clusters — strong evidence that they are the result of smaller clusters colliding and merging. These kind of events are the most energetic since the Big Bang itself.