In 1887 the Michelson-Morley experiment was performed, which was supposed to detect the so-called ether wind, which would be due to the motion of the Earth relative to the ether, i.e. to the medium in which light would manifest itself, and therefore the only relative to which its speed would be isotropic.But the experiment revealed that the speed of light result also isotropic relative to the Earth and, therefore, did not reveal any aether wind.In order to justify this negative result, Lorentz hypothesized that all objects that move in the aether, undergo a length contraction in the direction of motion, thus making the speed of light result isotropic, while in reality it is not.Instead Einstein stated that light propagates in a vacuum and that its speed is isotropic in all celestial objects, whatever the motion between them, considering it as a postulate of his theory of Special Relativity. Furthermore he stated that space integrates with time, to become a 4-dimensional space-time that is curved by matter. Which are all unreasonable and even impossible to imagine hypothesis.Towards the end of the 1900s, analyzing data relating to CMB obtained through space stations, it was found that the Earth is moving at a speed of about 400 km/s relative to a reference system, which could very well be the much sought after ether.So I, after having ascertained that this observation proves Lorenz right, thus in-validating the second postulate of Special Relativity and, consequently, also the theory itself, and after having also ascertained that, based on Einstein's theories, the scientific community had to accept that the expansion of the Universe is accelerating, although in contrast with the law of conservation of energy, I de-veloped, always trying to provide explanations at least reasonable of the various physical phenomena, an alternative theory, which I have called the Space Quanta in Expansion which, among other things, hypothesizes a quantum gravity.On the basis of this theory, I carried out simulations of the journey of photons of a distant galaxy and of the CMBR, from which it results that the expansion of the Universe is decelerating, which is reasonably compatible with observations and with the laws of nature.Finally I made a comparison between it and Einstein's theories of relativity, demonstrating its greater compatibility with cosmological observations.