This time, choose "Earth-Moon with Satellite.grv" and click on OK.
This system has the same major bodies as before, but now includes a hypothetical man-made satellite which has gone a bit astray and is now in an inclined and relatively distant orbit around the Earth (most satellites circle a lot closer than this, and you'll shortly see why).
Make sure the speed is set quite low. (You'll notice that as you decrease the speed of the simulation, its accuracy increases, and vice-versa. More on this later.) Run the simulation by clicking on the "Start" button.
By default, Gravitorium plots a point on the orbit of bodies about every six hours of simulated time. The satellite is moving quite fast, so rather than a smooth orbit line, you'll probably see a cloud of disconnected dots. Use the Plot Frequency control to plot more often - once every hour of simulated time is probably about right.
The orbit of the satellite is pulled out of shape by the Moon, and gradually becomes more and more eccentric. Eventually you'll see the satellite dragged almost bodily out of its neat orbit to trail the Moon. At around 70 days of simulated time, you'll see the satellite become entangled with the Moon and bent into quite a different orbit. Here's some snapshots of my screen not long after that. The "edgeways" views of the ZY and XZ planes are probably more interesting than the "top down" view of the XY plane.
