Website: https://earthobservatory.nasa.gov/Features/OrbitsHistory/page2.php http://www.kilidavid.com/Our_Universe/Pages/Planetary_Motion.htm Book: https://www.wolframscience.com/reference/notes/1047c Give a brief overview of how gravity and motion of the planets was viewed historically before newton. Include the views of Aristotle, Galileo, and Kepler Kepler found the three laws of Planetary Motion this is what started it for Newton. Kepler observed the way the planets move around the sun, and how the moon orbited around the earth. Kepler found out the the planets orbit must be circular because the planets are circular. Aristotle figured out two more reasons when planets are round, he noted that the earth took a circular bite out of the moon during one of its phases which would only be possible if the earth was round. Second the placing of the stars in the sky differed with the where you were standing of earth. Galileo was the first to prove the earth revolved around the sun, by looking through a telescope. Galileo saw that four moons orbiting jupiter, by figuring this out he destroyed the greek idea the earth was the center of all motion. 2. Describe Isaac Newton's life and his scientific contribution …show more content…
Newton had a very difficult childhood, his mother got remarried when he was three years of age. After that he was sent to live with his grandparents, when newton's stepfather dies his mother brought him back to live with her, his mother wanted him to become a farmer, but one of his uncles saw his scholarly talent. Which he was sent to school and then later he made it into Trinity college in Cambridge. Newton had a great impact on Astronomy, physics, and mathematics. Most of Newton’s greatest ideas came to him in the years 1665-66. Newton invented the reflective