Thanks so much. I think I get the idea. Also, thanks for pointing out the relative insignificance of the speeds of different galaxies; it makes much more sense now.
Meaning of "age of universe"
This question may have been addressed somewhat indirectly in other posts, but I'm interested in specifics.
Exactly what assumptions about time (and the universe) are implied by a statement like, "The age of the universe is X years old"? In particular, does this...