Biography of galileo
Biography of galileoGALILEO
Galileo Galilei was born in Pisa, Italy on February 15, 1564. Galileo lived in Pisa until he was about 10 years old. In 1574 his family moved to Florence where Galileo started his education at a monestary named Vallombroso, . In 1581, Galileo went to the University of Pisa to study medicine, while at the University of Pisa, Galileo discovered an interest in Physics and Mathematics; he switched his major from medicine to mathematics. In 1585, he left the university to become a teacher. During a four year unemployment he tutored and perfected theories. In 1589, Galileo was given the job of professor of Mathematics at the University of Pisa and received another job at the University of Padua as the chair of Mathematics. Galileo taught at the university for eighteen years. In 1584, Galileo discovered the principle of which showed that the period of a pendulum remains the same no matter what the amplitude is. Galileo discovered this while watching a chandelier swing in the cathedral next to the Tower of Pisa. He proved the isochronism theory in 1602. In 1606, he invented the hydro-static balance this device that found the specific gravity of substances by weighing them under water. Galileo also found that Aristotle's belief that objects fall at velocities proportional to their weight was wrong. He found that all objects fall at the same rate; it’s only the density of the median they fall through that causes larger objects to fall slower. Galileo made many discoveries while he was teaching at the University of Padua including a calculating compass, a thermometer, a pump,and the theory of parabola. The parabola was due to the combined forces of horizontal motion and vertical acceleration. This theory was very useful in the firing of guns, and rockets. Another discovery Galileo made while he was at the University of Padua was the "law of fall," which was based on Newtons law of motion. At his final years at the University of Padua, Galileo heard about an invention called the telescope, he rebuilt one that was 20 times more powerful than the original. Galileo used this for astronomy. Around the time this telescope was built, most people believed, including the Roman Catholic Church, was that the Earth was the center of the universe and that all things around the earth were perfect and unchanging. Galileo believed in the Copernican system which stated that the sun is the center of the universe, rather than the earth. Galileo believed in the Copernican system. Galileo found was that the moon was not a perfect sphere, and that Jupiter had moons going around it. Galileo also found that Venus had phases just like the Moon, this meant that it had to be orbiting the sun. He also discovered that the sun had spots on it that could be used to see how the earth orbits around it. The first print of his discoveries was in "The Starry Messenger." this got him in trouble with the Catholic Church and he was banned to discuss the Copernican system. Galileo broke this rule with "Dialogues Concerning the Two Principle Systems of the World" which stated why the Copernican system was better than the Ptolemaic system. In 1623, Cardinal Barberini, a friend of Galileo’s, was elected Pope Urban VIII. The Pope's attitude toward Galileo had changed dramatically over time. A secret commission was set up to investigate Galileo's book. Galileo pled ignorance in his case and was charged with heresy. In the end, he was forced to live out the rest of his life under house arrest. Nevertheless he wrote “Dialogues Concerning Two New Sciences” had it smuggled out of Italy to be printed in Holland and later to be printed against his will. Only after 1638, when he became totally blind, were more visitors permitted. When he died in 1642, the Inquisition prohibited the Court and citizens of Florence to give him a public funeral or to erect a marble mausoleum for his grave.