File:Rotation v spin Parent 1.png

English: The rotational condition that exists before they were cut out is the same fundamental condition as after they are cut out. The common point for “Parent 1” lay internal to “Parent 1”. After they are cut out the common point lay in the same place as it did before, however now the common point lay external to the cutout. The motion of both parent 1 and the cut out are one and the same. However since the physical perimeter of the body has changed we must consider where the common point of motion lay internal or external of that body. The fact that the physical perimeter of a body has changed itself does not demand a change in the nature of any motion that body may have, which is under consideration. Orbit and spin are fundamentally one and the same thing. The Difference here is simply in a orbit the common point lay external to the body and in a spin the common point lay internal to the body in question. Both are "rotations" and both are the very same "rotation".