Galileo Galilei was a brilliant Italian mind who revolutionized the scientific world. At the age of seventeen he enrolled at the University of Pisa, where he studied medicine and became interested in mathematics. Due to a lack of interest in medicine and financial matters, Galileo did not complete his degree, but years later managed to obtain a position as a professor at the University. A few years later he began working at the University of Padua and remained there until 1610 (Andrade, 1964). It was during this period that he made most of his scientific discoveries. During this period, life in Italy for the discoveries was difficult due to the power of the Church over scientists; however, Galileo decided to go against the will of the Church and open society's eyes to the true aspects of astronomy and natural sciences (Leveillee, 2011). Thanks to his passion for mathematics, Galileo was able to see the world quantitatively, rather than qualitatively. Even though there were difficulties, Galileo still brought light to issues in his field and motivated others to continue with his study. He is remembered as the father of astronomy and remains one of the most competent scientists in the field (Andrade, 1964). This essay will explore Galileo's observation of the contradiction in Aristotle's reasoning through mathematics, his struggle between church and science, as well as his contribution to astronomy with the invention of the telescope. Galileo devised a very different approach to seeing the motion of the fall. objects. Unlike Aristotle, who saw motion in terms of nature, Galileo focused strictly on the mathematical aspects (Finocchiaro, 1975). Galileo once said, “The universe cannot be read until we have learned…halfway through the paper…knowledge consisted of observations and experiments. It was Galileo's work and ideas that paved the way for the rise of other great scientists such as Newton, who were able to build on his theories and advance science to become the science we know today. Galileo's work with the telescope showed the vast possibilities that could be explored. Nowadays we not only have more powerful telescopes, but also the possibility of directly exploring space (Carhart, 1881). Galileo fought for the acceptance of the heliocentric model of the universe, and although he did not live to see it prosper, thanks to him it is the heliocentric model that is active to this day. It is the basis for the study of astronomy and is taught in schools. He is known as the father of astronomy and remains one of the most remembered and influential scientists in the field.