When the earth spins, there is a star in the northern hemisphere that seems to be fixed Polaris. It is used for celestial navigation and is part of the Ursa Minor constellation -- or the pattern of stars called the little dipper. finish: solid brass, electro-plated with non-tarnishing silver finish, giclee print, domed, ear wires are hypo-allergenic dimensions: hangs approx. 1.75" (gift boxed with provenance card).