An Orrery is a mechanical device that models the solar system. In the middle, there is the Sun, and around it spins planets, the Moon, and occasionally fixed stars. They were used in ancient Greece to aid navigation, and they have been used as an illustrative device by the sciences since the 1700s.
They used to be made out of metal, cogs, and gears. But today we will make one out of
Drawables, Animators, and
PropertyValuesHolders. You saw that one coming, didn't you?
Enough lollygagging, let's make it! The steps for making an Orrery are as follows: