Birth: February 19, 1473 Death: May 24, 1543 Place of Birth: Toruń, Poland Career: 1491-1494 Studied mathematics at Kraków Academy 1496 Went to Italy to study astronomy and law at the University of Bologna 1497 Began observations of the Sun, Moon, and planets 1514 Wrote Commentariolus, an outline of his astronomical ideas, but did not circulate it widely 1543 Published De Revolutionibus Orbium Coelestium (On the Revolutions of the Celestial)

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