![]() ![]() He quickly published a short treatise outlining his discoveries, “Siderius Nuncius” (“The Starry Messenger”), which also contained observations of the moon’s surface and descriptions of a multitude of new stars in the Milky Way. In January of 1610 he discovered four new “stars” orbiting Jupiter-the planet’s four largest moons. In 1609 Galileo built his first telescope, improving upon a Dutch design. Despite his own later troubles with the Catholic Church, both of Galileo’s daughters became nuns in a convent near Florence. ![]() Galileo had three children with Marina Gamba, whom he never married: Two daughters, Virginia (Later “Sister Maria Celeste”) and Livia Galilei, and a son, Vincenzo Gamba. During those years he performed the experiments with falling bodies that made his most significant contribution to physics. The first direct attribution of the quote to Galileo dates to 125 years after the trial, though it appears on a wall behind him in a 1634 Spanish painting commissioned by one of Galileo's friends.įrom 1589 to 1610, Galileo was chair of mathematics at the universities of Pisa and then Padua. In 1583 he made his first important discovery, describing the rules that govern the motion of pendulums.ĭid you know? After being forced during his trial to admit that the Earth was the stationary center of the universe, Galileo allegedly muttered, "Eppur si muove!" ("Yet it moves!" ). In 1581 he entered the University of Pisa at age 16 to study medicine, but was soon sidetracked by mathematics. Galileo Galilei was born in Pisa in 1564, the first of six children of Vincenzo Galilei, a musician and scholar. Galileo’s Early Life, Education and Experiments ![]()
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