In any system of macro bodies, relative considerations can provide only parameters of their relative positions. Use of a reference frame related to a static central macro body causes a planetary orbital path to appear as a closed geometrical figure around the central macro body. As the central macro body is moving; this does not reflect physical reality. Although this helps to explain cyclic phenomena, properties attributed to elliptical/circular planetary orbital paths are unreal. Due to constant linear motions of free macro bodies in space, it is practically impossible for a free macro body to orbit around another in any type of closed geometrical path. However, they may orbit about each other and follow a common median path in space. The real orbital path of a planetary body is wavy about the median path of the central body, with the planetary body moving to the front and rear of the central body alternately.
