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Zwicky, Fritz (1898–1974), Swiss-born U.S. astronomer and astrophysicist best known for his studies of supernovas, which he showed to be quite distinct from, and much rarer than, novas. He also did pioneering work on jet propulsion.
See also: Astronomy; Supernova.
21st Century Webster's Family Encyclopedia21st Century Webster's Family Encyclopedia - Yap Islands to Zworykin, Vladimir Kosma