In 1583, Galileo entered the University of Pisa to study medicine. Armed with high intelligence and talent. He soon became fascinated with many subjects, particularly mathematics and physics. While at Pisa, Galileo was exposed to the Aristotelian view of the world, then the leading scientific authority and the only one sanctioned by the Roman Catholic Church. At first, Galileo supported this view like any other intellectual of his time and was on track to be a university professor. However due to financial difficulties.Then Galileo left the university before earning his degree.