Galileo was born in Pisa, but later moved with his family to Florence. In 1581, he enrolled in the University of Pisa to study medicine, then switched to mathematics and natural philosophy. He investigated many areas of science, and is perhaps most famous for his discovery of the four largest moons of Jupiter (still called the Galilean moons). Galileo’s observations led him to support the Sun-centered model of the solar system, which at the time was in opposition to the teachings of the Roman Catholic Church. In 1633, he was tried and made to recant this and other ideas. He was sentenced to house arrest, which lasted the rest of his life. During his confinement, he wrote a book summarizing his work on kinematics (the science of movement).
1623 The Assayer
1632 Dialogue Concerning the Two Chief World Systems
1638 Discourses and Mathematical Demonstrations Relating to Two New Sciences