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Fritz Zwicky
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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 observational astronomy. In 1933, Zwicky was the first to use the
virial theorem
to infer the existence of unseen
dark matter
, describing it as "".
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