character: Johannes Kepler
topic: Laws of Planetary Motion
grade: 10
subject: Physical Education
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character: Galileo Galilei
topic: Influence on Kepler's Work
grade: 10
subject: Physical Education
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character: Isaac Newton
topic: Universal Gravitation and its Relation to Kepler's Laws
grade: 10
subject: Physical Education
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character: Tycho Brahe
topic: Brahe's Observations and Kepler's Laws
grade: 10
subject: Physical Education
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