Perseus Cluster (Abell 426)
Perseus Cluster. Wendelstein Observatory.
The Perseus Cluster (Abell 426) is a diffuse, irregular cluster of galaxies, containing about 500 members and located about 250 million light-years away, that is dominated by and centered on the Seyfert galaxy NGC 1275 associated with the radio source Perseus A. The mass of cluster has been estimated at 200 trillion solar masses.