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Use your mobile phone on the desk like a toy car and drive it around and around in circles. Drive around in ever decreasing circles until you are spinning on the spot, rotating on an axis.
Just because you are driving around something, does not mean you are not spinning yourself. It just means you are moving in an orbital path as you are spinning. Look out the window of a real car doing the same thing, and you will notice the objects around you move around and around.
Now, hold your mobile phone on the desk and just draw circles with it, without turning it. It is just on an orbital path without spinning, and if you were inside a real car doing this, the view outside your window would not change.
Baz.
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