character: Galileo Galilei
topic: Heliocentric Model
grade: 3
subject: Science
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character: Copernicus
topic: Development of the Heliocentric Model
grade: 3
subject: Science
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character: Aristotle
topic: Geocentric Model Contrast
grade: 3
subject: Science
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character: Kepler
topic: Planetary Motion Supporting Heliocentric Theory
grade: 3
subject: Science
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