This is a fully functional handmade grand orrery. Turning the large lower outer gear drives all the other gears in the gear train which moves the planets around the sun with relative orbital speeds to one another. It stands roughly 14.25” high, about 11.5” wide when all planets are aligned on the same side of the sun and about 14.75” wide when Uranus and Neptune are on opposite sides of the sun. The sun is made of wood and the planets and moons are made of wood and plastic. The moons are fixed and do not move around their host planets. The 26 fully functional and smoothly operating gears are made of pla plastic and all shafts are brass. It is mounted on a wooden base. This is a unique item not only for lovers of astronomy but also those who are interested and enjoy how gears work together. The beer in the picture is for a size comparison only and is not included. This orrery was designed and built by the seller. Please ask any and all questions before purchasing. Thank you.