The world's first water-powered celestial globe was created by Zhang Heng, who operated his armillary sphere by use of an inflow clepsydra clock. Subsequent developments were made …

armillary sphere, early astronomical device for representing the great circles of the heavens, including in the most elaborate instruments the horizon, meridian, Equator, tropics, polar …

Dec 26, 2025 · An armillary sphere is an astronomical device made up of a number of rings linked to a pole. These rings represent the circles of the celestial sphere, such as the equator, the …

With this demo you can explain the motions of the stars and of the Sun, and show various aspects of the seasons. The main features of the sphere itself are shown schematically in figure 1.

Apr 29, 2025 · Armillary spheres are ancient tools used to model the movement of celestial objects in the sky. Armillary spheres date back to ancient Greece and China and became …

Jun 13, 2025 · One such method of demonstrating the movement of the celestial sphere is the armillary sphere. An armillary sphere is a model of the heavens featuring a central globe with a …

The meaning of ARMILLARY SPHERE is an old astronomical instrument composed of rings showing the positions of important circles of the celestial sphere.

ARMILLARY definition: consisting of hoops or rings. See examples of armillary used in a sentence.

Armillary spheres date back to the ancients, and were certainly used by the 2nd-century astronomer and mathematician Claudius Ptolemy of Alexandria. They were mathematical …

Factsheet What does the word armillary mean? There are two meanings listed in OED's entry for the word armillary. See ‘Meaning & use’ for definitions, usage, and quotation evidence.