Kepler's Laws

Wait for the applet to load and then click here to initialize the animation. You will need Netscape 3.0 or above to run this animation.

Instructions

Run the animation to see what is going on. You may start, stop, and reset at any time. Click and drag inside the animation to read the coordinates of the ball in order to obtain numerical values.

Question: The animation purports to model a solar system, however one of the planets does not obey all of Kepler's laws. Identify that planet. (The sun is yellow.)