Plato proposed that the seemingly chaotic wandering motions of the planets could be explained by combinations of uniform circular motions centered on a spherical Earth, a novel idea in the 4th century. Eudoxus rose to the challenge by assigning to each planet a set of concentric spheres.
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Plato proposed that the seemingly chaotic wandering motions of the planets could be explained by combinations of uniform circular motions centered on a spherical Earth, a novel idea in the 4th century. Eudoxus rose to the challenge by assigning to each planet a set of concentric spheres.