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=Nicholas Copernicus (1473-1543)= Nicholas Copernicus was born in 1473 was born in Poland, he was the youngest of four children. After the death of the his father he was adopted by his uncle Lucasz Watzelrode. When Nicholas turned nineteen he enrolled in the University of Cracow for four years. Here is where he started to become interested in mathematics and astronomy. Before Nicholas could get his degree he left the university and went to Italy. While in Italy he began to study law and medicine. He then began to develop his astronomical observations. He used the ideas of Ptolemy and his theory that Earth was the center of the universe. With his observation he began his theory of "heliocentric" system. The heliocentric system is the thought that the sun is in the middle of the universe and that all the planets revolve around it. This challenged theories before that believed the sun was in the center. Nicholas Copernicus began writing book called On the Revolutions of the Heavenly Spheres. On May 24, 1543 he was presented with a copy of his future book and later that same day he died.

Accomplishments
Nicholas Copernicus accomplished many different things during his life but he did not get credit for most of them untill after his death. His Major accomplishment was his heliocentric theory. His theory was that the sub was in the center of the universe and all the planets revolved around the sun. Nicholas also said Earth is not stationary, it turns on its axis once a day. When his knowledge spread to other people he set the scene for major advances in science and marked the beginning of the scientic revolution and astronomy.