character: Galileo Galilei
topic: The stars and planets above us
grade: 1
subject: Writing
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character: Copernicus
topic: The heliocentric model of the solar system
grade: 1
subject: Writing
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character: Johannes Kepler
topic: The motion of planets
grade: 1
subject: Writing
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character: Isaac Newton
topic: Gravity and the planets
grade: 1
subject: Writing
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