Co·per·ni·cus 
(kō-pûrnə-kəs, kə-), Nicolaus 1473-1543.
(kō-pûrnə-kəs, kə-), Nicolaus 1473-1543. Polish astronomer who proposed a heliocentric model of the universe, contradicting the Ptolemaic system that had dominated medieval cosmology.
Nicolaus Copernicus