Part 1 of Essay
Galileo Galilei was one of the greatest astronomer and mathematician of the seventeenth century. His support of support of Copernican cosmology against the Church’s strong opposition and his development of a telescope and his unorthodox opinions as philosopher of science were the central concerns of his career. He ....

Part 2 of Essay
.... them was a telescope. The observation of the sky, which Galileo carried out with his telescope led to the discovery of the satellites of Jupiter and to Galileo’s increased adherence the Copernican system. He studied Saturn and observed the phases of Venus and the sunspots. In between his studies and discoveries Galileo began to encounter serious opposition of the motion of the earth. He discovered that it was earth that roll around the sun. “By that time, with any luck, they will be learning that ....