Observing separate galaxies, their groups and clusters, we understand that the Universe is highly inhomogeneous on sufficiently small scales. At the same time, according to the cosmological principle, the Universe is supposed to be homogeneous and isotropic when viewed at a large enough scale. The natural question arises: what is this typical averaging scale, at which the cosmological principle comes into its own? The standard approach leads to the value ~ 370 Mpc, contradicting the fact of existence of the observed largest cosmic structures with Gpc dimensions. However, there is another suitable value in cosmology, which is 10 times larger at present, namely, the Yukawa range of gravitational interaction. Therefore, we can trust the cosmological principle starting from distances, which exceed ~ 3.7 Gpc, and then the contradiction associated with the Gpc structures may be removed.
#CosmologicalPrinciple #Universe #LargestCosmicStructures
#Yukawa #GravitationalInteraction