character: Galileo Galilei
topic: Understanding Gravitational Forces in Space
grade: 9
subject: Physics
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character: Isaac Newton
topic: Laws of Motion and Universal Gravitation
grade: 9
subject: Physics
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character: Albert Einstein
topic: Theory of General Relativity and Gravity
grade: 9
subject: Physics
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character: Neil deGrasse Tyson
topic: Modern Interpretations of Gravity and Space
grade: 9
subject: Physics
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