
Cosmological principle
Theory that the universe is the same in all directions

Theory that the universe is the same in all directions
In modern physical cosmology, the cosmological principle is the notion that the spatial distribution of matter in the universe is uniformly isotropic and homogeneous when viewed on a large enough scale, since the forces are expected to act equally throughout the universe on a large scale, and should, therefore, produce no observable inequalities in the large-scale structuring over the course of evolution of the matter field that was initially laid down by the Big Bang.
Read on Wikipedia · Image NASA / WMAP Science Team, Public domain
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