The universe might not be as you think. Until recently, the Lambda Cold Dark Matter model seemed to have a lock on cosmology. Like earlier Big Bang models, it supposes that the universe expanded from a hyperdense state and that the expansion of spacetime causes the Hubble redshift of light. Dark matter and dark energy are added to overcome problems relating to the cosmic microwave background and the unexpected dimness of remote supernovae.
This is pretty fascinating, but I’m surely not educated enough to understand its veracity.
Is the basic take here that we are assuming distance as causal for the way we observe a lot of light sources, and it’s possible instead we are surrounded by a large gravitational field creating that distortion instead?