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character: Aristotle
topic: Influence on Ptolemy's Geocentrism
grade: 9
subject: Mathematics
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character: Ptolemy
topic: Geocentric Model of the Universe
grade: 9
subject: Mathematics
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character: Copernicus
topic: Heliocentric Theory Challenge to Geocentrism
grade: 9
subject: Mathematics
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character: Galileo
topic: Support for Heliocentrism Against Ptolemaic System
grade: 9
subject: Mathematics
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