If space is expanding between galaxies and collapsing into them, wouldn’t a convection cycle make more sense, given the overall effect is the two effects balance out? Then the background radiation really is the solution to Olber’s paradox; The light of infinite sources, shifted off the visible spectrum.

One problem I’ve had with Big Bang Theory is that it’s impervious to falsification, given anytime there is a gap between prediction and observation, some enormous new force of nature is added. What if accountants could just write in a figure and call it dark money, whenever they found a gap in the books?

The first patch was when they found redshift increased proportionally in all directions, creating the impression we are at the center of this expansion, so it was changed from an expansion in space, to an expansion of space, because spacetime! Which would seem to totally ignore the premise of spacetime, that the speed of light is always measured as a constant. If the light is redshifted, obviously the speed of intergalactic light isn’t constant to intergalactic space. It would seem this expansion is still being denominated in lightyears, as a metric distinct from the expansion. Which would mean the speed of light is the base metric.

I suspect we discover redshift is an optical effect, given we are the center of our point of view.