Two different questions.
1) Does the universe have an "edge"? When the Earth was thought to be flat, then we imagined an edge. Sail to the edge, fall off: you're in space!
Alas, we found the Earth to be a sphere and we live on the surface. The surface has no edge. You can keep on going in any direction, forever.
Because the radius is finite, if you do go in the same direction forever, you'll pass over your starting point, over and over again.
The surface of a sphere is a 2-D object, wrapped around a third dimension. A hypersphere is a 3-D object, wrapped around a fourth dimension.
The Universe is thought to be a hypersphere. Whatever direction you start off, you can go forever and ever. Most cosmologists also think that the radius of curvature of the hypersphere is infinite. So that if you start off in a given direction, you will arrive at your start point, after an infinite time (meaning: I will not have waited for you).
Recent observations by the WMAP probe (checking the Cosmological Microwave Background radiation) seems to have excluded possibilities of "small" curvature radius. So, either the universe is very large or it is infinite.
Plus, infinite also solves a lot of other problems, such as: what is the expanding universe expanding "into"? If it is infinite, then it expands into itself.
So, if the universe really is an infinite hypersphere, then there are no edges. We have no proof of that, of course, but this is the version that seems to explain the most of what we observe.
2) As for what lies beyond any unknown existence, that is too esoteric for me.
2007-07-18 03:50:52
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answer #1
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answered by Raymond 7
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Well, there you have it, Einstein. You've answered your own question. What lies beyond the known existence is the "unknown existence".
Why do we keep getting thick-skulled people who demand that scientists should know what existed BEFORE the "Big Bang"?? As far as we know, NOTHING existed before the "Big Bang". But, that's because nothing "prior" to the event survived the event.
And scientists never asserted that they knew for a fact that this was the beginning of our reality -- only that the observed evidence might be logically explained by a theory, a scientifically logical fairy tale.
The origins of the universe are obscure, at best. We've little choice but to accept it or get over it. 13.7 billion years is a long time to try and look backwards into events that we are still only beginning to understand. New evidence is being uncovered all the time, some of which is causing us to logically question whether there is indication of alternate realities, and alternate times.
There's just not enough information to go back that far or be able to "look" that deep into space.
2007-07-18 10:54:42
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answer #2
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answered by Anonymous
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It depends what you mean 'edges'. It appears that our universe is a three-dimensional object stretched into four dimensions, so to us there doesn't seem to be any edge. There is a LIMIT, but that's not the same thing as an edge. If you look into four dimensions, there is probably simply nothing at all outside, although there may perhaps be other universes that ARE positioned in a direction from our universe in some dimension or another.
There are also other 'edges' you could talk about. For example, it is concievable that our entire universe is a computer simulation being run by aliens in a universe 'above' ours. We can also imagine other, parallel universes that do NOT exist in any direction from our own universe but which may still be accessible. There's a lot to think about.
2007-07-18 10:42:32
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answer #3
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answered by Anonymous
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I'd suggest you look up M Theory.
It basically says that our universe is a part of a multiverse, and each one acts like a fluctuating membrane.
So according to THIS theory anyway, if you could go past the edge of our universe, you'd be in the 11th dimention where the other 'branes/ or universes exist.
2007-07-18 11:24:45
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answer #4
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answered by Nunna Yorz 3
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More universe lies beyond the known universe.
2007-07-18 12:41:31
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answer #5
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answered by Ryan C 2
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well who knows but your in a balloon that is expanding - well at the moment - and you get to the edge - you start to go around the inside of the balloon - but might not even realise you are as the surface makes you go around - you will never know whats on the other side of that balloon unless you can go thru it some how and might find the balloon is just beside another balloon or just nothing but as now one can see the other side of the balloon and as yet no one can even see the edge of the balloon your guess is as good as anyones
2007-07-18 10:35:32
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answer #6
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answered by ccsnsw 2
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Empty space, except for parts of stars that have blown up, plus roge planets that have escaped the gravity of their sun.
2007-07-18 11:32:19
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answer #7
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answered by John R 5
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The Void.
2007-07-18 13:50:57
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answer #8
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answered by PokerChip 3
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Empty space.
2007-07-20 12:59:45
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answer #9
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answered by johnandeileen2000 7
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garden edging
2007-07-20 23:35:10
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answer #10
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answered by Anonymous
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