Scientists draw graphs of data to help analyse a situation. A velocity-time graph of a journey can give information about acceleration (the gradient) and distance travelled (displacement).

Key fact The gradient of speed-time and velocity-time graphs represent acceleration. The area under a speed-time graph represents the distance travelled.

Now that I have the angular velocity of the planet, I can just calculate its position in each time step as: Really, it doesn't matter what values you use for G and M.