An asteroid is heading for Earth. It's up to you to save us all. Click the green flag to start, and then use the arrow keys to push the asteroid to avoid the Earth and put it into orbit. Click anywhere in the background to clear and re-start the traced path of the asteroid. The speedometer shows the asteroids speed relative to the Earth. Compare the asteroid's speed at different times in its orbit.
This simulation models gravitational motion and orbital paths. This version allows the user to manipulate the asteroid with the mouse instead of the keyboard.
