A

David

Darling

Bautz-Morgan classification

The Bautz-Morgan classification is a system for classifying clusters of galaxies based on morphology. It recognizes three main types. Type I has a single supergiant cD galaxy, type III (for example, Virgo Cluster) has no members significantly brighter than the general bright population, and type II (for example, Coma Cluster) is intermediate between the other two.