- #1

AWA

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So everybody is pretty confident that, no matter what relativity might appear to indicate ,the cosmological principle only affects the spatial dimensions.

That's why I would like for someone to help me solve this false paradox: When we observe the universe we inevitably not only observe the spatial dimension but (specially at high redshifts) due to the finite nature of light we see a look-back time, we are actually perceiving spacetime, not just space. so if we expect to observe ever more and more homogeneity with distance we a re actually expecting to watch more and more homogeneity the farther in time we look back . But paradoxically this leads to the perfect cosmological principle which is forbidden by a universe with a finite age.

Surely there is a trap in this reasoning, but I can't see it right now.

Any hint would be apreciated.