character: Carl Sagan
topic: Exploring the Universe: The Doppler Effect in Astronomy
grade: 9
subject: Physics
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character: Albert Einstein
topic: Relativity and its impact on Astronomy
grade: 9
subject: Physics
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character: Stephen Hawking
topic: Black Holes and Cosmic Phenomena
grade: 9
subject: Physics
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character: Isaac Newton
topic: Fundamental Laws of Motion and their role in Space Exploration
grade: 9
subject: Physics
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