character: Carl Sagan
topic: Exploration of the Universe
grade: 12
subject: Physics
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character: Neil deGrasse Tyson
topic: Cosmic Perspective
grade: 12
subject: Physics
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character: Stephen Hawking
topic: Black Holes and the Universe
grade: 12
subject: Physics
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character: Isaac Newton
topic: Laws of Motion in Astronomy
grade: 12
subject: Physics
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