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Maggie Tidcombe asked the Naked Scientists: I have been reading about the origin and life of the universe, about the big bang, the following inflationary period and the subsequent slower expansion we are now in. My question is... in which area of space, or in which direction can the source of this expansion be found? If everything in our universe has expanded from a single point and may well contract back to the same point, then do we know in which direction to look for this point? Where did the big bang happen? If our universe is closed and curving round on itself like an inflated balloon, then there must be a centre. Which way is the centre, is it where quasars and more densely populated areas of the universe are to be found... In which direction can the oldest part of the known universe be found?Thank you for an excellent programme Maggie Tidcombe, Cornwall.What do you think?
where were all these spots 13.7 billion years ago?Finally, what do you mean by "virtually infinite"?
Quote from: Bill S on 16/11/2010 00:50:48 where were all these spots 13.7 billion years ago?Finally, what do you mean by "virtually infinite"? I use the word "virtually" because there was probably no truly infinite density. According to Loop Quantum Gravity the density was enormously high but not infinite, and at these high densities we get repulsion, which causes the initial expansion of the universe. So the points were very much closer at the BB, but still separate.http://www.scientificamerican.com/article.cfm?id=big-bang-or-big-bounce