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He was a Greek philosopher
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He was a Greek philosopher who wrote about the moon and sun
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He was an astronomer.
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Was a thought for when the Sun centered
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Was an Italian polymath.
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He was an astronomer that found and named Pluto
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He was a German mathematician, astronomer, and astrologer.
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The thought of when the Earth centered
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He was British astronomer
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A Russian satellite
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1st man to step foot on the moon
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It was the expansion of the universe
