A New theory for Description of Accelerated Expansion of the Universe, the Origin of CMB Radiation and its Anisotropies

In this article, we show that our expanding cosmos probably is inside a supergiant spherical shell. In fact, here we show that probably the reason for the accelerated expansion of the universe, the origin of CMB radiation and the origin of a part of the anisotropies of this radiation is the existence of a huge rigid spherical shell that surrounds entire of the universe. In the last part of the article, we show that between the theory of the cosmos’s shell and the theory of the last scattering surface, it is more logical to consider the cosmic shell as the cause of the existence of CMB.