Galileo Galilei 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. Galileo has been called the "father of modern observational astronomy,"[6] the "father of modern physics,"[7] the "father of science and "the Father of Modern Science."[8] Stephen Hawking says, "Galileo, perhaps more than any other single person, was responsible for the birth modern science.