Galileo Galilei is born in Pisa, Italy.
Galileo begins studying medicine, but soon turns his attention to mathematics and physics.
Galileo studies the isochronism of pendulum motion, a crucial step in mechanics.
Galileo develops an early form of the thermometer.
Galileo improves the existing telescope designs and uses the instrument for astronomical observations.
Galileo observes craters on the moon and four moons orbiting Jupiter.
Galileo publishes his famous work in which he defends the heliocentric model.
Galileo is summoned before the Inquisition on charges of heresy because of his heliocentric views.
Galileo spends the final years of his life under house arrest, where he nevertheless continues to carry out scientific work.
Galileo dies in Arcetri, near Florence, as a blind but tireless spirit of science.
Galileo dies at the age of 77, still officially condemned by the church. However, his legacy will live on: his methods of experimental research and his defense of the heliocentric model form the foundation of modern natural science. It is not until 1992 that the Catholic Church formally acknowledges that his condemnation was an error.