- published: 07 Jan 2015
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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.
Fritz Zwicky was born in Varna, Bulgaria to a Swiss father. His father, Fridolin (b. 1868), was a prominent industrialist in the Bulgarian city and also served as ambassador of Norway in Varna (1908–1933). The Zwicky House in Varna was designed and built by Fridolin Zwicky. Fritz's mother, Franziska Vrček (b. 1871), was an ethnic Czech of the Austro-Hungarian Empire. Fritz was the oldest of the Zwicky family's three children: he had a younger brother named Rudolf and a sister called Leoni. Fritz's mother died in Varna in 1927 and his father Fridolin remained in Bulgaria until 1945, when he returned to Switzerland. His sister Leoni married to a Bulgarian from Varna and spent her entire life in the city.
In 1904, at the age of six, Fritz was sent to his grandparents in Glarus, Switzerland, "the Zwicky's ancestral Swiss canton, to study commerce." His interests shifted to math and physics and he received an advanced education in mathematics and experimental physics at the Swiss Federal Institute of Technology, located in Zürich, Switzerland. In 1925, he emigrated to the United States to work with Robert Millikan at California Institute of Technology (Caltech) after receiving the "international fellowship from the Rockefeller Foundation."
Sir Isaac Newton PRS MP (25 December 1642 – 20 March 1727 [NS: 4 January 1643 – 31 March 1727]) was an English physicist, mathematician, astronomer, natural philosopher, alchemist, and theologian, who has been "considered by many to be the greatest and most influential scientist who ever lived." His monograph Philosophiæ Naturalis Principia Mathematica, published in 1687, lays the foundations for most of classical mechanics. In this work, Newton described universal gravitation and the three laws of motion, which dominated the scientific view of the physical universe for the next three centuries. Newton showed that the motions of objects on Earth and of celestial bodies are governed by the same set of natural laws, by demonstrating the consistency between Kepler's laws of planetary motion and his theory of gravitation, thus removing the last doubts about heliocentrism and advancing the Scientific Revolution.
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