ns. The obvious problems with Aristotle's theories were overlooked and other questions were explained by the idea of Heaven and Earth. The Scientific Revolution shattered the tied between science and religion. Revolutionary thinkers, such as Copernicus (1473-1543), who stated that we lived in a heliocentric universe, and Kepler (1571- 1630), who developed the three laws of planetary motion, radically changed the views of the pre-revolution period. Copernicus' heliocentric universe disproved the beliefs of Aristotle and Ptolemy, which were the partial basis of the medieval cosmology. Kepler's three laws of planetary motion proved that planets have elliptical orbits, that a planet's velocity is not uniform, and brought the planets together into a unified mathematical system. Other great thinkers such as Galileo (1564-1642) and Sir Isaac Newton (1642-1727) helped to develop a new cosmology not dominated by Christian belief and the Heavens. Newton's Law of Gravitation changed ideas about the motion of an object. It showed that the laws and for
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