character: Nicolaus Copernicus
topic: Heliocentric Model of the Solar System
grade: 3
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character: Galileo Galilei
topic: Support of the Heliocentric Model
grade: 3
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character: Johannes Kepler
topic: Planetary Motion and Heliocentrism
grade: 3
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character: Aristotle
topic: Geocentric Model of the Solar System
grade: 3
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