The celestial sphere of the present Flag of Brazil replaced the armillary sphere in 1889. The armillary sphere was reintroduced in the national arms and in the national Flag of Portugal in …

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 …

In this article, we'll explore how the armillary sphere works, what the rings on it show, and how it helps visualize the movement of the Sun on the celestial sphere.

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 …

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 …

Some armillary spheres were used for observing the heavens and some, like this one, were used for teaching and demonstration (Image 1). They are made up of the circles or rings (Latin: …

How does an Armillary Sphere work? At its core, an armillary sphere is tailored to a specific latitude, meaning its structure – particularly the tilt of the equatorial ring and the axis of rotation …

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.

Oct 18, 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 …

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 …