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Nicolaus Copernicus (1473–1543)
Copernicus, Nicolaus (kō-pėr’ni-kus). A famous Polish astronomer; born in Thorn, Poland, Feb. 19, 1473; died at Frauenburg, Prussia, May 24, 1543. He wrote: ‘Revolutions of the Celestial Orbs’ (De Orbium Cœlestium Revolutionibus), in which is proclaimed the fact that the sun and not the earth is the center of our planetary system. (See Critical and Biographical Introduction).