The Catalogue of Galaxies and of Clusters of Galaxies (pr CGCG) was compiled by Fritz Zwicky in 1961–68. It contains 29,418 galaxies and 9,134 galaxy clusters.[1] [2]
I Zwicky 18
I Zwicky 32, a face-on spiral galaxy in the constellation Canes Venatici.
Ring galaxy II Zwicky 28