C/1961 R1 (Humason)
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What links here
Milton L. Humason
NGC 5195
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National Geographic Society – Palomar Observatory Sky Survey
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Humason (crater)
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List of galaxies
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Messier 61
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Pinwheel Galaxy
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Mount Wilson Observatory
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Cepheid variable
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Cosmos: A Personal Voyage
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Messier 100
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Dodge Center, Minnesota
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Hubble's law
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1972
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Edwin Hubble
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Milton Humason
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