I propose to show that God, in creating the universe and arranging the spheres, had in view the five regular solids of geometry, and fixed by their d… - Johannes Kepler

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I propose to show that God, in creating the universe and arranging the spheres, had in view the five regular solids of geometry, and fixed by their dimensions the number, proportions and motions of the spheres. Take the sphere of the earth as a unit and circumscribe it with a regular dodecahedron. The sphere that contains this dodecahedron is the sphere of Mars.