Is the universe finite? If so is it possible to find the center? Apparently not as it is uniform as far as the eye can see in all directions (giving us the illusion of being at the center). Could we then estimate what percent of the total universe is contained in the visable universe?
Ignoring time for the moment, could we imagine our three-dimensional world as the surface (brane) of a sphere in four dimensional space? i.e. If we could go far enough would we eventually return to where we started? In that case there would be no center, just as there is no center of the surface of a sphere.
What would the implications be of the universe not being finite?
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Some quotes from a google site:
ReplyDelete"There is no centre of the universe!"
"The universe may be finite in size and growing like surface of an expanding balloon, but it could also be infinite."
"The Big Bang....was an explosion OF space, not an explosion IN space."
"....it is space itself that expands evenly."
"....the universe....is homogeneous on the largest scales we can see"
"The observable part is very large, but it is probably very small compared to the whole universe, which may even be infinite."
"We still have no real answer to the question 'Where is the centre of the universe?'"