character: Carl Sagan
topic: Seasonal Changes in Star Visibility throughout the Year
subject: Science
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character: Neil deGrasse Tyson
topic: Star Visibility and Astronomy in Different Seasons
subject: Science
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character: Nicolas Copernicus
topic: The Heliocentric Model and Its Impact on Star Visibility
subject: Science
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character: Galileo Galilei
topic: Telescope Use and Observing Stars Across Seasons
subject: Science
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