Galileo (1564-1642)

He is an Italian astronomer and physicist. His many achievements including the discovery of the isochronism of the pendulum, and the demonstration that the acceleration of a falling body does not depend on its mass. He constructed telescopes, discovered Jupiter's satelites, and observed sunspots and the mountainous nature of the moon. A supporter of Copernican theory, Galileo was forced by the Inquisition to recent (1633).