character: Christiaan Huygens
topic: Improvements in Telescope Technology in the 17th Century
grade: 10
subject: Physics
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character: Galileo Galilei
topic: Early Telescope Innovations
grade: 10
subject: Physics
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character: Isaac Newton
topic: Reflecting Telescope Development
grade: 10
subject: Physics
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character: Johannes Kepler
topic: Keplerian Telescope Modifications
grade: 10
subject: Physics
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