DescriptionJacques du Chevreul's illustration of the Copernican System.jpg
English: In this image, du Chevreul displays the earth, the moon, and the planets in a 3 o'clock Copernican arrangement. Opposite of the earth, but in the same orb, at 9 o'clock, du Chevreul adds the counter-earth required by original Pythagoreans.
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Source
Reproduced from an original copy of Jacques du Chevreul's book Sphaera in History of Science Collections, University of Oklahoma Libraries."
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