ASTRONOMER

Fritz Zwicky

1898 - 1974

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Fritz Zwicky (; German: [ˈtsvɪki]; 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 observational astronomy. In 1933, Zwicky was the first to use the virial theorem to postulate the existence of unseen dark matter, describing it as "dunkle Materie". Read more on Wikipedia

His biography is available in different languages on Wikipedia. Fritz Zwicky is the 94th most popular astronomer (down from 76th in 2019), the 28th most popular biography from Bulgaria (up from 29th in 2019) and the most popular Bulgarian Astronomer.

Fritz Zwicky is most famous for his discovery of dark matter. In 1933, he observed that the velocities of galaxies in the Coma Cluster were too high to be attributed to the gravitational pull of the cluster. He hypothesized that there must be some unseen matter holding the cluster together.

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Among ASTRONOMERS

Among astronomers, Fritz Zwicky ranks 94 out of 644. Before him are Mariam al-Asturlabi, Petrus Apianus, Pieter van Musschenbroek, Jacques Cassini, Ferdinand Verbiest, and Varāhamihira. After him are Angelo Secchi, Giovanni Battista Riccioli, Christian Heinrich Friedrich Peters, Henry Norris Russell, Abu Hanifa Dinawari, and Jean Philippe Loys de Cheseaux.

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Contemporaries

Among people born in 1898, Fritz Zwicky ranks 46. Before him are Peng Dehuai, Kenji Mizoguchi, Lionel Robbins, Ahmad Shah Qajar, Héctor Scarone, and Konrad Henlein. After him are Howard Florey, Jeanne Hébuterne, Josef Terboven, Julius Schreck, Therese Neumann, and Totò. Among people deceased in 1974, Fritz Zwicky ranks 33. Before him are Peng Dehuai, Otto Strasser, Satyendra Nath Bose, Lewis Strauss, Zalman Shazar, and Louis Kahn. After him are Carl Spaatz, David Alfaro Siqueiros, Walter Brennan, Virginia Apgar, Cass Elliot, and Walter Lippmann.

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In Bulgaria

Among people born in Bulgaria, Fritz Zwicky ranks 28 out of 415. Before him are Hristo Stoichkov (1966), Tzvetan Todorov (1939), Ratko Janev (1939), Ivan Asen II of Bulgaria (1195), Sylvie Vartan (1944), and Boris Christoff (1914). After him are John of Rila (876), Rumen Radev (1963), Kiril, Prince of Preslav (1895), Ivan Shishman of Bulgaria (1350), Bonifacius (350), and Vasil Levski (1837).

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Among ASTRONOMERS In Bulgaria

Among astronomers born in Bulgaria, Fritz Zwicky ranks 1. After him are Violeta G. Ivanova (2000).

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