A simulation of the restricted three body problem in a rotating reference frame. The yellow dots are large massive bodies, and the blue path shows the chaotic trajectory of an object with negligible mass. The reference frame rotates at a rate of 9 rotations/minute to keep the large masses at a fixed distance apart.
The small mass is actually five different masses that start very close together (with a separation of about one millionth of the distance between the large masses), but whose paths diverge completely after 3 minutes or so, illustrating the sensitive dependence on initial conditions.