The brass armillary sphere w/ stone base measures 3" x 7". It comes intricately assembled from antiqued brass parts and set on a stone base. The armillary sphere is a classic desk ornament for the broad and cultured of mind. This armillary sphere has the earth positioned inside a mesh of antiqued brass hoops. The course of the sun is is shown by a wide band called the ecliptic circle. Armillary spheres go back to B.C. Greece.