character: Astronomer
topic: Understanding constellations and their historical significance in navigation
grade: 9
subject: Science
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character: Galileo Galilei
topic: Advancements in telescope technology and its impact on astronomy
grade: 9
subject: Science
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character: Ptolemy
topic: The Almagest and its influence on star maps and navigation
grade: 9
subject: Science
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character: Polaris (North Star)
topic: Role in navigation and its relationship with constellations
grade: 9
subject: Science
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