Cosmological distances

From a little tidbit by an interested informer, I got to learn about someone wondering if the measured distances of stars and galaxies are really applicable when it takes so long for their light to reach us, that their actual distances now could be completely different. It is actually a bit mind-bending to think about all the issues, which happen to be the sort of thing I love to think and explain, except my explanation was getting rather long for a comment.

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