How does the armillary sphere work?
In respect to this, how is the armillary sphere used today?
The armillary sphere is also known as the spherical astrolabe, the armilla, or the armil. In addition to its being used in the Greek world, the armillary sphere was also used throughout Asia and the Islamic Empire. These devices were used as teaching tools and models.
One may also ask, how does an armillary sundial work?
As the sun travels across the sky, the gnomon of our armillary sundial casts a shadow onto a surface that indicates the hour. The longer your armillary is in direct sunlight, the better it will give accurate readings.
ρα—sphaira, "globe, ball") is a perfectly round geometrical object in three-dimensional space that is the surface of a completely round ball (viz., analogous to the circular objects in two dimensions, where a "circle" circumscribes its "disk").