Never the less you are using an arbitrary definition of 'center' to arrive at that conclusion, and I'm saying there is no mathematical foundation for doing that... mathematics only pop when you arbitrarily set a definition of 'center'.
Getting back to being a bit metaphysical: Think of this example... take one finger and then swing a hula hoop around your finger, (assuming you can do so without moving your finger)... your finger is the center point, right? But now imagine a point on the diameter of the hula hoop and it's stationary... now everything is moving around said point, including your finger.
It's a legit, mathematically sound, supposition.
