Le livre du Ciel et du Monde Illustration of the Celestial spheres.Original art, Nicole Oresme (ar
Le livre du Ciel et du Monde Illustration of the Celestial spheres. Original art, Nicole Oresme (artist unknown); Scan, Bibliothèque National de France (detail). The planetary spheres were thought to be planes of existence in between the earth and the heavenly regionsNote that although the order of the spheres is conventional, with the Moon and Mercury closest the Earth and Saturn and the stars farthest, the spheres are convex upward centered on God rather than convex downward centered on the Earth. -- source link
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