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Believed the Earth was at the center of the universe; disproved by Copernicus
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Like Ptolemy, he believed the Earth was at the center of the universe
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Believed that the Sun was at the center of the solar system
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Found the Earth was ellpitical adn not perfectly round
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Disproved Aristotle's theory about heavier objects falling faster than lighter ones
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Made the 3 Laws of Gravity