"Where the senses fail us, reason must step in." ― Galileo Galilei From Galileo Galilei Scientist Added on 1/31/2026 About Galileo Galilei Galileo Galilei was an Italian scientist whose work advanced physics, astronomy, and scientific method. His telescopic observations supported heliocentrism and transformed early modern astronomy. Born: 1564-02-15 Died: 1642-01-08 View all quotes from Galileo Galilei