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Galileo Galilei

Galileo Galilei (1564-1642)was an Italian astronomer, physicist and engineer. His Dialogue Concerning the Two Chief World Systems is one of the most important scientific treatises ever written. Using the dialogue form, a genre common in classical philosophical works, Galileo masterfully demonstrates the truth of the Copernican system over the Ptolemaic one, proving, for the first time, that the earth revolves around the sun.