character: Nicolaus Copernicus
topic: Heliocentric Theory
grade: 6
subject: Social Studies
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character: Galileo Galilei
topic: Support for Heliocentric Theory
grade: 6
subject: Social Studies
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character: Johannes Kepler
topic: Laws of Planetary Motion
grade: 6
subject: Social Studies
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character: Isaac Newton
topic: Gravity and the Heliocentric Model
grade: 6
subject: Social Studies
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