Armillary Sphere

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  • Armillary Sphere

Dublin Core

Title

Armillary Sphere

Description

This armillary sphere is for demonstrating the phenomenon of the seasons of the year and to show either the real motion of the earth or the apparent motions of the heavens. The outer frame consists of two meridian rings marked with degrees of latitude, equatorial and ecliptic circles, and tropic and arctic circles. Inside the Antarctic Circle is another marked out in 24 hours. Inside the outer frame is a rod connecting the poles that carry the globe, a meridian circle marked with the degrees of latitude, and pivoting at right angles, a brass horizon ring. The armillary and the globe are arranged to rotate independently to demonstrate that whichever is at rest, the rising and setting of the sun, is at the same point of the horizon and at the same time. The armillary sphere has its origins in antiquity, and some were used for astronomical measurements. They became essential as an aid to teachers of astronomy.

Creator

George Adams, London

Date

1790

Rights

Reproduction for publication, exhibition, web display or commercial use is only permissible with the consent of Special Collections of the S.C. Williams Library at Stevens Institute of Technology.

Collection

Files

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Citation

George Adams, London, "Armillary Sphere," in Stevens Digital Collections, Item #272, http://librarycollections.stevens.edu/items/show/272 (accessed October 22, 2017).

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