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Publicated the heliocentric solar system. Believed in Ptolomic planets meaning that planets made epicycles (having their own smaller orbit).
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Made observatory for many astronomers to use. Also a mathemetician and compiled a data on Mars which later helped Kepler with his things.
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Galileo was born one of greatest astronomers ever. Promoted Copernican theory. Made telescope.
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Created 3 laws of planetary motion. Believed in Copernican theory worked with Tycho Brah's group.
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Explained how heart pumped blood through body and how food and blood weren't connected. He is considered a genius in both health and science.
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He was a mathemetician who invented Analytical Geometry. Most important contribution was philosophical writing stating that science and math could explain everything in nature.
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Developed idea of gravity. Helped with creation of calculus. Developed new system of world made new start ups possible.