Ann wrote:Could a non-constant dark energy "constant" explain the disagreements?
That does indeed appear to be the direction that the evidence is converging toward: a non-constant Hubble factor with universal expansion rates changing over time. It looks like it is time to stop calling it a “constant”, since it ain’t ‘cuz it ain’t one.
Or is it possible that the more we learn about the Universe, the lesser the need for a mysterious dark energy contributor becomes? Or is that, too, wishful thinking?
Possible but unlikely, I think. Although studies looking across different epochs are yielding various expansion rates, they all show expansion. This variable effect must be caused by something that is variable over universal time, IMHO.