What dynamic solution emerges when CP combines with General Relativity?

Answer

Friedmann–Lemaître–Robertson–Walker (FLRW) metric

The combination of the Cosmological Principle—the assertion that the universe is homogeneous and isotropic in space—with Albert Einstein's theory of General Relativity leads directly to a specific mathematical description of spacetime dynamics. This resulting framework is known as the Friedmann–Lemaître–Robertson–Walker (FLRW) metric. This metric is crucial because it immediately suggests that the universe cannot be static; it must either be expanding or contracting. This requirement for motion is consistent with the observational data provided by the Hubble-Lemaître Law, which confirms that galaxies are generally moving away from each other.

What dynamic solution emerges when CP combines with General Relativity?
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