Can someone tell me something about Kepler and Copernicus theories about the universe?
Copernicus’s theory placed the Sun at the centre of the universe, with Earth moved and was a planet like the other planets. His book first printed at A.D. 1543 (fifteen forty three) A.D. He found a more reasonable arrangement of circles (epicycles and deferents). But Copernicus (1474-1543) believed that the natural heavenly motions were both circular. Copernicus’s tomb has been found recently in Poland. There were still no telescopes in Copernicus’s time. His theory explained many things, such as retrograde motion. Kepler was a convinced Copernican. How would the planetary positions appear if seen from the sun? Kepler spent four years on this project. Sixteen years later, he found the precise and elegant scheme. Now calles Kepler‘s three laws, discribing the planetary orbits. The most significant law states that rather than moving in sun-centered circles, each planet moves in a Sun-focused ellipse. Kepler‘s theory did more than describe known data. It also predicts new observations tha
