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. Read more on Wikipedia

Since 2007, the English Wikipedia page of Fritz Zwicky has received more than 552,012 page views. His biography is available in 50 different languages on Wikipedia (up from 49 in 2019). Fritz Zwicky is the 76th most popular astronomer (down from 47th in 2019), the 29th most popular biography from Bulgaria (down from 24th 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.

Memorability Metrics

  • 550k

    Page Views (PV)

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    Historical Popularity Index (HPI)

  • 50

    Languages Editions (L)

  • 8.35

    Effective Languages (L*)

  • 3.50

    Coefficient of Variation (CV)

Page views of Fritz Zwickies by language

Over the past year Fritz Zwicky has had the most page views in the with 60,159 views, followed by German (13,154), and French (8,503). In terms of yearly growth of page views the top 3 wikpedia editions are Simple English (131.15%), Polish (115.35%), and Ido (83.82%)


Among astronomers, Fritz Zwicky ranks 76 out of 644Before him are John Flamsteed, Jacques Cassini, Friedrich Wilhelm Argelander, Antonio Abetti, James Bradley, and Walter Baade. After him are Stephen Gray, David Fabricius, George Darwin, Russell Alan Hulse, Abū Ishāq Ibrāhīm al-Zarqālī, and Percival Lowell.

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Among people born in 1898, Fritz Zwicky ranks 48Before him are Therese Neumann, Latife Uşşaki, Konrad Henlein, Vicente Aleixandre, Héctor Scarone, and Totò. After him are Peggy Guggenheim, Julius Schreck, Joseph Murphy, Felix Kersten, Hanns Eisler, and Henry Hathaway. Among people deceased in 1974, Fritz Zwicky ranks 31Before him are Peng Dehuai, Otto Strasser, Lewis Strauss, Louis Kahn, David Alfaro Siqueiros, and Patrick Blackett. After him are Walter Lippmann, Cass Elliot, Nikolai Kuznetsov, Vannevar Bush, Marcel Pagnol, and Franz Jonas.

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In Bulgaria

Among people born in Bulgaria, Fritz Zwicky ranks 29 out of 415Before him are Sylvie Vartan (1944), Tzvetan Todorov (1939), Vasil Levski (1837), Ivan Asen II of Bulgaria (1195), Ivan Shishman of Bulgaria (1350), and Vlado Chernozemski (1897). After him are Christian Rakovsky (1873), Rumen Radev (1963), Zhelyu Zhelev (1935), Michael Shishman of Bulgaria (1280), Aleksandar Stamboliyski (1879), and Peter I of Bulgaria (927).

Among ASTRONOMERS In Bulgaria

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