To observe that objects can orbit in both oval and circular orbits.
Most earth satellites have orbits which are oval shaped.
The oval pattern is determined by the angle of Insertion Into space. The point farthest from the earth Is called apogee. In the orbit nearest to the earth Is called perigee. Attach the string to the thimble and place it on top of the upright hanger. Attach the weight to the other end of the string.