NOTES:
1) Use checkboxes (Seconds, Minutes, etc) to choose time interval. "Hours" works best for animation.
Use slidebar at right to control simulation speed. There are 7 speeds, 3 forward (right), 3 reverse (left) and one neutral
(center), although depending on your computer speed, there may be no difference between the two faster speeds. The
bar is initially set at the slowest forward speed. Use "Reset Time" to return to present.
2) Compare the velocities of the moons. How do they change when passing by
each other?
3) Compare the orbital periods of the four moons. What is special about them?
pstoddard@niu.edu
October, 2012