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I think the quoted statement is trivial, becauseastronomers *define* open
and closed to mean infinite and non-infinite respectively.(There's
nothing "fundamental" or "in principle" about it.)
I need further tutoring:
I thought "open" and "closed" were used to describe whether
the Universe
would collapse or not -- ie whether the Universe would
expand forever or at
some point start to contract to an eventual Big Crunch.
But this aside for a moment --and whether we can actually "see" (by
whatever means) to the "edge" of the Universe -- doesn't the current
standard model assume that the Universe is finite in size
-- although I
don't know what that would mean: There could be no one
standing outside
the Universe with a large caliper to measure the size. Or
maybe there is ....
I clearly need tutoring here.
Jim Green
mailto:JMGreen@sisna.com
http://users.sisna.com/jmgreen