New-ish measurements from Hubble + Webb say that the Universe is expanding at different rates everywhere: https://www.livescience.com/space/cosmology/james-webb-telescope-confirms-there-is-something-seriously-wrong-with-our-understanding-of-the-universe
Why is this actually surprising?
According to mainstream GR, there is no difference between gravity and spacetime curvature which varies everywhere there are massive objects.
If spacetime is bent e.g. around black holes at galactic cores and the curvature also varies over time with objects moving around like a water surface forming currents or waves that rise and recede, wouldn't this also affect the measured velocity of expansion wherever you look out into the sky like measurements of ocean currents at local scales would be affected by waves or cross currents?
