The nickel plated brass armillary sphere measures 11" x 11.5". It comes intricately assembled from nickel plated brass parts. 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 nickel plated 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.