Newton, in his "Principia", already noticed that rotational movement does not depend on an external reference frame, because, even without any external reference, an observer in a rotating bucket can determine his state of movement through the appearing of centrifugal and Coriolis forces. Rotational movement is absolute. Quantum mechanics, too, attributes rotation an absolute value, because the state of a spinning object is characterized by a positive and a negative series of quantum numbers, separated by a zero-state (ground state) of rotation. Furthermore, each rotational state has its characteristic rotational energy, and energy is an absolute, accountable quantity, because of the energy conservation law. A recent article, "Laplace provides for movement and momentum conservation", Journal of Interdisciplinary Mathematics, Vol. 29 (2026), No. 7, pp. 2279-2289, shows that rotational movement is the only movement which can solve the Laplace equation, but only under the additional condition that momentum is conserved. The Laplace equation, which was termed a "metaphysical condition for the stability of being", is thus also the origin of momentum conservation. Movement, i.e. energy, in the Universe, can only be transferred, cumulated and shared; it cannot appear out of nothing, nor disappear into nothing. Rest mass, as shown bei Einstein, is a form of energy; hence it is rotational movement, too. Momentum space, which is necessarily Euclidean, because of the energy and momentum conservation laws, can be conformally mapped onto our hyperbolic relativistic space through a hypercomplex rotation (extended Wick-rotation), which transforms circles into hyperbola, and angles into surfaces, showing that Kelpler's observation, that planet orbits cover in equal times equal surfaces, is in fact the energy conservation law.