posted on Mar, 31 2010 @ 09:25 AM
There is no space-time where there is no Universe. As it gets bigger, there is more space - that's what the expansion of the universe is - the
creation of more space. You can't travel past the edge of the Universe, because there is no there there.
At present, we can see back to about 480 million years after the Big Bang in visible light to certain galaxies that are 13.2 billion light years
away/in the past. But since the universe has been expanding in all directions, that 26.4 billion light year diameter sphere-shaped swathe of the
Universe we are able to see is only a small fraction of the total size of the Universe. We call what we can see the "Observable Universe," because
that is all we will probably ever be able to see or detect of existence. Everything else beyond that point has expanded "beyond the horizon" of
what is visible to us and light from there will never reach us because relative to them we are all moving away from each other faster than the speed
Current theory (but disputed by some serious people) is that the Universe will continue to expand in this way and except for our own galaxy,
everything else in the universe will be too far away and moving too fast from us to be observed. The sky will go dark, at least as far as other
galaxies are concerned. Any beings that might be alive at that time in existence might theorize that the Milky Way is the whole of the Universe,
because nothing else will be observable outside of it.