The Catalogue of Galaxies and of Clusters of Galaxies (or CGCG) was compiled by

Fritz Zwicky Fritz Zwicky (; ; February 14, 1898 – February 8, 1974) was a Swiss astronomer. He worked most of his life at the California Institute of Technology in the United States of America, where he made many important contributions in theoretical and ...

in 1961–68. It contains 29,418

galaxies A galaxy is a system of stars, stellar remnants, interstellar gas, dust, dark matter, bound together by gravity. The word is derived from the Greek ' (), literally 'milky', a reference to the Milky Way galaxy that contains the Solar System. ...

and 9,134

galaxy cluster A galaxy cluster, or a cluster of galaxies, is a structure that consists of anywhere from hundreds to thousands of galaxies that are bound together by gravity, with typical masses ranging from 1014 to 1015 solar masses. They are the second-l ...

Gallery

File:I Zwicky 18a.jpg,

I Zwicky 18 I Zwicky 18 is a blue compact dwarf galaxy located about 59 million light years away in the constellation Ursa Major. The galaxy was first identified by Swiss astronomer Fritz Zwicky in a 1930s photographic survey of galaxies. Age Studies at t ...

File:Galaxy I Zwicky 32.jpeg, I Zwicky 32, a face-on spiral galaxy in the constellation Canes Venatici File:One ring to rule them all.jpg,

Ring galaxy A ring galaxy is a galaxy with a circle-like appearance. Hoag's Object, discovered by Art Hoag in 1950, is an example of a ring galaxy. The ring contains many massive, relatively young blue stars, which are extremely bright. The central region co ...

II Zwicky 28 II Zwicky 28 is an interacting ring galaxy at a distance of approximately 390 million light-years. The sparkling pink and purple loop in Zw II 28 is not a typical ring galaxy due to the fact that it does not seem to have the usual visible central ...

References

Astronomical catalogues Astronomical catalogues of galaxies Astronomical catalogues of galaxy clusters * {{Astronomical-catalogue-stub