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 lack of interest in medicine and financial problems, Galileo did not complete his degree, but years later he managed to get a professorship 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. At this time, life in Italy for discoveries was difficult because of the power of the Church over scientists; however Galileo decided to go against the wishes of the Church and open the eyes of society to the true aspects of astronomy and natural sciences (Leveillee, 2011). Because of his passion for mathematics, Galileo was able to view the world in a quantitative rather than qualitative way. Even though there were difficulties, Galileo still highlighted problems in his field and motivated others to continue his studies. He is remembered as the father of astronomy and remains one of the most knowledgeable scientists in this field (Andrade, 1964). This essay will explore Galileo's observation of the contradiction in Aristotle's reasoning through mathematics, his struggle between the Church and science, and his contribution to astronomy with the invention of the telescope. Galileo proposed a very different approach to visualizing the movement of the fall. objects. Unlike Aristotle, who viewed motion in terms of nature, Galileo focused strictly on the mathematical aspects (Finocchiaro, 1975). Galileo once said: "The universe cannot be read until we learn... middle of article... knowledge consisted of observations and experiments." It was Galileo's work and ideas that paved the way for other great scientists such as Newton to build on his theories and advance science into the science we know today. today. Galileo's work with the telescope showed the vast possibilities that could be explored. Today, we not only have more powerful telescopes, but also the ability to explore space directly (Carhart, 1881). Galileo fought for the acceptance of the heliocentric model of the universe, and although he did not live to see it flourish, thanks to him it is the heliocentric model that is active to this day . It is the basis of the study of astronomy and is taught in schools. He is known as the father of astronomy and remains one of the best-known and most influential scientists in the field...