discovered four of Jupiters moons, which proved that Jupiter did nor orbit the earth. He named these moons the Medicine Planets. In 1610, the Grand Duke of Tuscany, Cosimo de Medici, who appointed Galileo his personal mathematician, a position which required him to move back to Florence. While in Florence, many more discoveries came, one being the evidence of sunspots, which helped to prove the Copernican theory. He became world-renowned when, in 1610, he published his findings. Since Galileo discovered a few problems with the Aristotlian theory of motion, he developed his own theory of the motion of free-falling objects. In 1632, Galileo published his Dialogue concerning the two Chief World Systems in which he presented his arguments both for and against the earth centered planetary system and the sun centered planetary system. He was then placed under house arrest in his villa in Florence for these views. He finally died in 1642, but his works and thoughts eventually led to the modern scientific process and modern mathematics. Sir Isaac Newton was born in 1642 in Lincolnshire, England. He was a premature infant and was not expected to live past one week, but fortunately survived. He attended school in the local day schools and then later in Grantham, but his true interest was in engineering. He left school at fourteen years old when his stepfather suddenly died, and was forced to help his mother on the farm. He soon became so obsessed with books and studying that he was sent back to school. In 1661, he was accepted into the University of Cambridge and graduated in 1665, which is an accomplishment in itself. Newton soon began pondering gravity and why objects fell toward the center of the earth. He was the first scientist to realize that it could extend for infinity. He later returned to Cambridge and taught Mathematics there for two years, but left again in 1669. In 1672, he was elected into the Royal Society and constructed the first...
