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Okay
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He did some research before he died that helped other theories in the future
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He did some big mathamatical problems and helped astronomy
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He is known because of his laws of how planets moved
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He discovered the telescope
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He worked out what the rings around saturn were
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He discovered Gravity
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He worked out when Halley's Comet would orbit
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He made a compass like device but it vanished in germany
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