Earth and Moon Orrery

My submission is a fully functional and astronomically accurate Earth and Moon orrery (well, as accurate as you can make it in Lego!). This Earth and Moon orrery set is interactive, educational, and looks great as a display model.

Rotating the handle causes the Earth to revolve on it's axis, and the Moon to orbit around the Earth. The gear ratios inside the base have been designed so that the Moon orbits once for every 28 revolutions of the Earth, accurately representing the 27.323 days it actually takes the Moon to orbit the Earth in real life. The Moon also orbits in the same direction as the Earth rotates on it's axis.

The model of the Earth features the main landmasses in...roughly...the correct places! The 4 sides of the base show the sun and the 8 planets of our Solar System. I tried to represent the different sizes and colours of the planets, and included some extra details for Jupiter and Saturn.

This set contains 273 pieces and has a 10x10 stud base. Thanks for looking!