Smaller ones include Phoenix, whose components all have a richness class of zero.
Smaller ones include Phoenix, whose components all have a richness class of zero. Many of their component structures are listed in the Abell catalogue. Their discovery had its roots in distribution maps produced by Shapley and Ames. They typically do not appear dynamically relaxed, and are usually found on the outskirts of enormous voids in large filamentary or sheet-like structures, such as the Great Wall. The Local Group and the Virgo Cluster belong to the same one, which is moving towards the Great Attractor. FTP name these large collections of galaxy clusters.
Smaller ones include Phoenix, whose components all have a richness class of zero.
{supercluster}