What was the mechanical concept used in early geocentric models proposed by thinkers like Eudoxus?

Answer

Nested spheres carrying the celestial bodies

Early attempts to model celestial motion, such as those by Eudoxus, relied on a beautiful mechanical concept involving multiple concentric, nested spheres, each carrying a specific celestial object.

What was the mechanical concept used in early geocentric models proposed by thinkers like Eudoxus?

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