Galileo Galilei

Who is Galileo Galilei?

Galileo Galilei was an astronomer, physicist, and mathematician born in Pisa, often called the 'father of modern science' and the 'father of observational astronomy'. He improved the telescope and used it to make groundbreaking discoveries, including the moons of Jupiter (now called the Galilean moons), the phases of Venus, sunspots, and the rough, cratered surface of the Moon. His observations provided strong evidence for the Copernican heliocentric model, which placed the Sun rather than the Earth at the center of the solar system. Galileo also made foundational contributions to the study of motion, inertia, and falling bodies, laying groundwork for later physics. His advocacy of heliocentrism brought him into conflict with the Roman Catholic Church; he was tried by the Inquisition in 1633, forced to recant, and spent his final years under house arrest. His work Dialogue Concerning the Two Chief World Systems remains a landmark of scientific literature.

Sources: Galileo Galilei, Sidereus Nuncius (1610) · Galileo Galilei, Dialogo sopra i due massimi sistemi del mondo (1632) · Encyclopaedia Britannica, entry 'Galileo'