character: Vesto Melvin Harold
topic: Role in Redshift
grade: 9
subject: Science
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character: Edwin Hubble
topic: Discoveries related to Redshift
grade: 9
subject: Science
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character: Albert Einstein
topic: Impact of Redshift on General Relativity
grade: 9
subject: Science
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character: Galileo Galilei
topic: Historical context of astronomical discoveries
grade: 9
subject: Science
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