Early astronomical instruments
type: Concept
narrower: Armillary spheres

Armillary spheres
type: Concept
contributor: AAS Frey.Katie
modified: 2020-10-26T18:45:15.929Z
modified: 2020-10-26T18:44:59.166Z
alternative label: Armilla
alternative label: Armil
alternative label: Spherical astrolabes
broader: Early astronomical instruments
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.