Place a satellite by clicking the mouse button at the place where you want it to start. Then drag the mouse with the button down to set the initial velocity. Next click on Action to see the result of your choices. Notice that the elapsed model time is shown at the lower left of the display. The units of time are seconds and since we are talking about covering very large distances relative to our previous displays, t is taken as 20 seconds. This is what allows the model to run so much faster than real time.