On Tuesday, April 23, 2013 12:23:30 PM UTC-7, RichD wrote: > Supposedly, our universe is closed and finite, although the > > geometry and topology isn't precisely known. This means > > a straight line (geodesic) traveler must return to his starting > > poiint, yes/no? Hence, curved space. > > > > At the same time, astronomers claim, that space is flat, to > > the precision of their measurements. Usually, this is > > accompanied by the comment that the universe is balanced > > between infinite expansion, or eventual collapse, we can't > > tell which. > > > > So, space is closed, but also flat... back in my day, they > > had something called a logical contradiction, which was > > considered a bad thing, but I guess times change... > > viva progress - > > > > -- > > Rich
Nobody said that the universe was closed and flat at the same time.
If the universe is closed and finite then the Big Bang created space out of nothing. But if the universe is straight Euclidian, what does Big Bang mean? I guess there was flat space before it and then one point exploded to a finite size.