In the past, I always had the impression the Universe went on forever which would imply in all directions in which case, only a sphere could accomodate this shape wise and have no unexplainable voids. But as it supposedly goes on forever, there would be no definable end boundaries.<br /><br />In recent years however, cosmology has suggested several different theories on the shape, and even definition of the Universe. The big bang suggests the Universe started approximately 13.5 B years ago in a single infinitesmal bang surrounded by well...nothing. No dimensions, no nothing. I'm one of those folks that have a hard time grasping the nothing part. I tend to favor a combined steady state big bang theory which suggests the Universe we know started as a bang inside a steady state larger and infinite entity. The void of space, of nothingness we know by my take, goes on forever. In my variation of several scenarios, the Universe we know is a collection of galactic clusters that banged into existence. There may be others that we cannot see because they are so far away, they are redshifted beyond our ability to see them.<br /><br />Example:<br /><br />Our Universe that we know consists of galactic clusters, the local group we reside in, the Virgo cluster and so on. All the clusters being within a certain proximity to one another that has allowed for definition under my scenario.<br /><br />The next group of clusters could have banged into existence perhaps 3 billion years ago but be much smaller than ours...and at say, 520 billion light years away, too far for us to currently detect. Beyond that, more galactic cluster collections going in all directions infinitely. Without the infinity part...we would still have to ask what surrounds a finite Universe as that proposed in the BB.<br /><br />Thats just my take.<br /><br />But cosmology is only a little further ahead of that in that they have certain mathematical evidence. Evidence so scarce that the theory is always open to new evidence w <div class="Discussion_UserSignature"> <p><strong>My borrowed quote for the time being:</strong></p><p><em>There are three kinds of people in life. Those who make it happen, those who watch it happen...and those who do not know what happened.</em></p> </div>