What are the major contributions of Copernicus?

In the 1500s, when most believed Earth was the center of the universe, Nicolas Copernicus proposed his theory that the planets revolved around the sun. ... model of the solar system. The tomb marks both his scientific contribution and his service as church canon. read more

Copernicus finished the first manuscript of his book,"De Revolutionibus Orbium Coelestium" ("On the Revolutions of the Heavenly Spheres") in 1532. In it, Copernicus established that the planets orbited the sun rather than the Earth. He laid out his model of the solar system and the path of the planets. read more

Even so, in the end, Copernicus’ theory was correct. t the time when Copernicus thought up the theory, the Earth centered astronomy was in trouble. The calender was out of step; the lunar orbit had the moon’s apparent size changing when it did not. Ptomely’s Earth centered Universe was not into place. read more