Galileo Galilei (1564-1642) was an Italian physicist, mathematician, astronomer, and philosopher who played a major role in the Scientific Revolution. His achievements include improvements to the telescope and consequent astronomical observations and support for Copernicanism, which held that the Earth is not the center of the universe and that the Earth and planets revolve around the Sun. Galileo has been called the father of modern observational astronomy, the father of modern physics, and the