Where did the universe start?

Answer 1

The Universe didn't begin anywhere. As far as we know, the Universe is everything that exists and everything is contained inside it, so the Universe isn't "anywhere". However there is speculation that maybe the Universe is just one floating in a sea of many Universes.

Current theories and models suggest that there is literally no place (not simply that we cannot get there) where you would reach the end or boundary of the universe. In a way, the 'edge' is itself multi-dimensional, and so any given location (including your tv room) could be considered in the 'edge'. While most theorists view current evidence as supporting a 'flat' contour to the universe (no odd bends that would make space itself resemble a torus, for example) who really knows? I think the bottom line is that it is virtually impossible that we will ever get to other universes in really fast space vessels, however fast we can get them to go. Any place we find in this manner will simply be another corner of the universe we occupy. If there are other universes, they are 'parallel' to ours. If the universe has an end then the universe started at the center.

Nobody knows for sure, simply put.

Where is the center of an infinitely large lake? There is none. The universe may be expanding, but that does not mean that it is not infinitely large.

Also, since the universe expanded from a infinitely small point, any point in the current universe is the center, so you could be in the center of the Universe! From the perspective of any point of the universe, that point will look like the center, or beginning point, as everything you look at is moving away with the exception of objects close to you on the cosmic scale. If the big bang model holds true, then all matter, space and time, was once in an infinitely dense singularity. Then as space expanded, all matter moved away from other matter in almost equal proportions. So from the point of view of any one piece of matter it would look as if it was not moving and thus the center and point of origin. Also, it is not matter that is moving when talking about the expanding universe. Its is space time itself that is being stretched.