character: Nicolaus Copernicus
topic: Heliocentric Theory and Its Impact on Planetary Motion
subject: Science
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character: Galileo Galilei
topic: Support of the Heliocentric Model
subject: Science
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character: Johannes Kepler
topic: Laws of Planetary Motion
subject: Science
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character: Isaac Newton
topic: Gravitational Force and Celestial Motion
subject: Science
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