Homocentric Spheres

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Creator's comment: "I summarized this article from memory". - Succu 12:17, 23 Nov 2010 (CET)

The theory of homocentric spheres was introduced in the 4th century BC. Developed by Eudoxus from Knidos . It was used to calculate the planetary motion in the context of a geocentric view of the world . It is not a cosmological model, just a mathematical representation. There was no right to reproduce a physical reality. Every planet as well as the moon and the sun are several interconnected spheresassigned. All spheres rotate around a common center, therefore homocentric (with the same center). All spheres assigned to a planet are connected to one another. In this way, the movements of the outer spheres are transferred to the inner one, on which the star is located.

With this theory, the movement of planets could be calculated and their position in the sky could be predicted through complicated arithmetic operations. Nicolaus Copernicus rejected this theory because it offered no way of calculating the distances between individual planets. The rejection of the theory of homocentric spheres was one of the intellectual steps that led him to develop his heliocentric worldview .