character: Galileo Galilei
topic: Support for Heliocentric Theory
grade: 3
subject: Science
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character: Nicolaus Copernicus
topic: Heliocentric Model of the Solar System
grade: 3
subject: Science
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character: Johannes Kepler
topic: Orbits of Planets
grade: 3
subject: Science
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character: Isaac Newton
topic: Laws of Motion and Gravity
grade: 3
subject: Science
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