Birth of Galileo Galilei
Galileo Galilei is born in Pisa, Italy.
Studies at the University of Pisa
Galileo begins studying medicine, but soon turns his attention to mathematics and physics.
Discovery of the law of the pendulum
Galileo studies the isochronism of pendulum motion, a crucial step in mechanics.
invention of the thermoscope
Galileo develops an early form of the thermometer.
Improvement of the telescope
Galileo improves the existing telescope designs and uses the instrument for astronomical observations.
Discovery of lunar mountains and the moons of Jupiter
Galileo observes craters on the moon and four moons orbiting Jupiter.
Publication of 'Dialogue Concerning the Two Chief World Systems'
Galileo publishes his famous work in which he defends the heliocentric model.
Trial before the Roman Inquisition
Galileo is summoned before the Inquisition on charges of heresy because of his heliocentric views.
house arrest and late works
Galileo spends the final years of his life under house arrest, where he nevertheless continues to carry out scientific work.
Death of Galileo Galilei
Galileo dies in Arcetri, near Florence, as a blind but tireless spirit of science.
Improvement of the telescope
After hearing about Dutch telescope designs, Galileo builds his own improved versions with a magnification of up to 20x. He points the instrument systematically at the sky for the first time, leading to a series of revolutionary discoveries that will change the worldview forever.