character: Galileo Galilei
topic: The discovery of Jupiter's moons and its significance in astronomy
grade: 9
subject: Science
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character: Johannes Kepler
topic: The laws of planetary motion and their relation to Jupiter's moons
grade: 9
subject: Science
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character: Sir Isaac Newton
topic: Gravitational theory and its impact on understanding Jupiter and its moons
grade: 9
subject: Science
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character: Carl Sagan
topic: The exploration of outer planets and the role of Galileo's discoveries
grade: 9
subject: Science
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