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Fritz Zwicky

Born: February 14, 1898, in Varna, Bulgaria
Died: February 8, 1974, in Pasadena, California, U.S.A

Swiss physicist and astronomer, Fritz Zwicky was the first to theorize that the cataclysmic explosions which some stars experience at the end of their natural evolution were the source of cosmic rays. It was he who coined the word supernova to describe this type of stellar explosion. During the course of his career he was able to identify a record total of 122 supernovas. It was Zwicky also who first postulated the existence of dark matter.

An asteroid, a lunar crater, and a galaxy have been name in his honour.

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Fritz Zwicky