character: Galileo Galilei
topic: History of Astronomy
grade: 2
subject: English Language
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character: Copernicus
topic: Heliocentric Theory
grade: 2
subject: English Language
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character: Isaac Newton
topic: Laws of Motion and Gravitation
grade: 2
subject: English Language
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character: Johannes Kepler
topic: Planetary Motion
grade: 2
subject: English Language
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