character: Galileo Galilei
topic: Support for the Heliocentric model
grade: 9
subject: History
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character: Nicolaus Copernicus
topic: Development of the Heliocentric model
grade: 9
subject: History
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character: Johannes Kepler
topic: Laws of planetary motion supporting heliocentrism
grade: 9
subject: History
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character: Galileo Galilei
topic: Use of the telescope in astronomical observations
grade: 9
subject: History
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