Size Limit of Universe
Date: Summer 2014
We know that a big crunch will occur after many years. The universe is now expanding. Up to what limit will it expand? What is the final limit of our universe?
I do not think there is enough evidence to say that the Big Crunch will occur. We have not found sufficient mass to cause a reversal to the expansion, we are currently observing an accelerating rate of expansion, and our strongest telescopes has not allowed us to see beyond a certain distance/time - we do not know.
Greg (Roberto Gregorius)
Very good question. We do not know. Nor do we know if the expansion will ever stop; right now there is evidence that it will never stop, and that the expansion is even accelerating.
David H. Levy
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Update: December 2011