RE: Forget Flat Earth Theory, now we have Flat Universe Theory!
December 6, 2010 at 6:09 am
(This post was last modified: December 6, 2010 at 6:10 am by Anomalocaris.)
(December 6, 2010 at 6:00 am)Tiberius Wrote: That's what I said. Something infinite cannot expand (which as the link states "if the universe is infinitely big, then the answer is simply that it isn't expanding into anything"), but the observable universe can. They are two different uses of the word "universe", one meaning the observable universe, and the other meaning absolutely everything (i.e. the entire infinite plane on which the observable universe expands).
Context is everything here.
No, whether it is infinite or not is unimportant. Either way the concept of an expending universe (not the observed behavior of the observable universe) does not involve it expanding into anything since whether it is finite or infinite it is already everything. Think of it as everything expands. The only question is whether the set of everything is finite or infinite.
