Compléter Science in English classes.Version en ligne In this exercise you have to read the follow text and then fill in the blank space the correct word. par Yerlin Fallas 1 multitude surface the sidetracked Messenger Stars Way Pisa Milky Jupiter mathematics Dutch stationary Medici short moons was moons commissioned pendulums universe 125 Galileo's Early Life , Education and Experiments . Galileo Galilei born in Pisa in 1564 , the first of six children of Vincenzo Galilei , a musician and scholar . In 1581 he entered the University of to study medicine , but was soon by . In 1583 he made his first important discovery , describing the rules that govern the motion of . Did You Know ? After being forced during his trial to admit that the Earth was the center of the , Galileo allegedly muttered ( " Yet it moves ! " ) . The first direct attribution of quote to Galileo dates to years after the trial , though it appears on a wall behind him in a 1634 Spanish painting by one of Galileo's friends . From 1589 to 1610 , Galileo was chair of mathematics at the universities of Pisa and then Padua . During those years he performed the experiments with falling bodies that made his most significant contribution to physics . Galileo , Telescopes and the Court In 1609 Galileo built his first telescope , improving upon a design . In January of 1610 he discovered four new " stars " orbiting ? the planet's four largest . He published a treatise outlining his discoveries , " Siderius Nuncius ( " The Starry " ) , which also contained observations of the moon's and descriptions of a of new stars in the . In an attempt to gain favor with the l grand duke of Tuscany , Cosimo , he suggested Jupiter's be called the " Medician .