character: Johannes Kepler
topic: Laws of Planetary Motion
grade: 6
subject: Foreign Language
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character: Isaac Newton
topic: Gravitational Forces
grade: 6
subject: Foreign Language
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character: Galileo Galilei
topic: Telescope Discoveries
grade: 6
subject: Foreign Language
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character: Nicolaus Copernicus
topic: Heliocentric Model
grade: 6
subject: Foreign Language
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