Galileo Galilei (b. February 15, 1564, Pisa, Italy – d. January 8, 1642, Arcetri, near Florence) was an Italian natural philosopher, astronomer, physicist, and mathematician. Born to Vincenzo Galilei, a musician, Galileo originally studied medicine at the University of Pisa but shifted to mathematics and philosophy. He became a professor at Pisa and later at the University of Padua. Galileo was known for his experime