character: Johannes Kepler
topic: Laws of planetary motion supporting heliocentrism
grade: 10
subject: Physics
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character: Galileo Galilei
topic: Observations supporting heliocentric theory
grade: 10
subject: Physics
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character: Nicolaus Copernicus
topic: Heliocentric model of the universe
grade: 10
subject: Physics
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character: Isaac Newton
topic: Gravitational forces and planetary orbits
grade: 10
subject: Physics
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