character: Dr. Emily Johnson
topic: Doppler Effect and its Role in Astronomy
grade: 11
subject: Physics
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character: Albert Einstein
topic: Relativity and the Doppler Effect
grade: 11
subject: Physics
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character: Isaac Newton
topic: Historical Context of the Doppler Effect
grade: 11
subject: Physics
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character: Carl Sagan
topic: Doppler Effect in Cosmic Exploration
grade: 11
subject: Physics
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