Abstract
Various theories were presented to explain the result of Michelson-Morley observations, namely the non-displacement of interference fringes after 90 degrees rotation of the interferometer. Like the theory of length contraction of FitzGerald, Einstein’s theory (namely the theory of independence of light velocity from observer velocity and source velocity without the necessity of the presence of Luminiferous Aether), the theories of Aether drag, and Emission theories. However, it seems that, apart from these theories, there is another way to explain Michelson-Morley null observations. In this article, we propose the theory of "Aether Attached to Earth" or abbreviated AATE. In this theory, Luminiferous Aether is a fact and is a transparent continuous medium that has filled the entire universe and is attached and is locked to the center of Earth and the whole of it, just like an integrated rigid object, is moved along with Earth in Space. It’s clear, in AATE theory, the velocity of Earth relative to Aether is zero; Therefore, the null displacement of the fringes can be explained. In addition to explaining the Michelson-Morley experiment, this theory can explain six other important phenomena and experiments. Here you will see that the AATE theory does not experience the failures of previous Aether theories.