Alternate Definitions for Armillary spheres

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Term: Armillary spheres
Definition:

An ancient instrument, used since ancient times until the Middle ages and later, to determine positions of celestial bodies. It consisted of an assemblage of rings, all circles of the same sphere, designed to represent the positions of the important circles of the celestial sphere.

Created 2023.04.16
Last Modified 2023.04.16
Contributed by Ryan McGranaghan
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