I am building a solar system model that is suspended in the air rather than sitting on the ground. It will be able to show the approx. real-time location of the planets in our solar system, and a user will be able to input a date into a mobile app that is designed to give it instructions. Using the date you enter it will calculate the positions of the planets in relation to the sun and move them into place. Unlike common orreries that are operated by hand, the planets and their movements will be controlled by a tiny computer controlling multiple motors.