This mechanical model is not only a work of art, but a functioning model of the solar system - an orrery - as it is known in the time that we are living.Suitable for adults and older children with supervision, when complete, this beautiful model stands 37cm high with a span of 60cm at it widest point - a truly impressive museum quality statement piece to display and use in your own home.Every element of your solar system model is the result of meticulous research and design, fine craftsmanship and precision engineering. The unique design features an exposed gear train that controls the speed and ratio of the orbits of the eleven planets as they move around the sun. Made from solid brass, the gears are hand-polished and lacquered to minimise tarnishing.Precision engineered brass gears.Unique, exposed gear train.Simple assembly with clear instructions, plus a FREE toolkit provided especially for this model.Includes an electric motor and UK power adapter.Features the sun, eleven planets and their moons.