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State the theory proposed by Copernicus?...

State the theory proposed by Copernicus?

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Nicholas Copernicus (1473 - 1543) proposed a new model called the 'Heliocentic model' in which the Sun was consiered to be at the center of the solar system and all planets including the Earth orbited the Sun in circular orbits.
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  14. State the theory proposed by Copernicus?

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