Recent content by id10tothe9

thnx didn't see there is already a second site for the answers, got to look into that..

well, yes, my question is about the whole universe or put in a better way all that came out of the big bang in this universe. When we say the universe has no boundary, I think it means we talk about a n-1 submanifold of a n dimensional manifold, so if we say we live in a 3D universe and it has...

But wouldn't having a boundary be in conflict with the isotropy, ie. the assumption/measurement (which is it?), that the relative velocity of matter would look the same any where in the universe and that there is no center of the universe?

thanks :)

didn't think of that :D thanks. Does this mean the isotropy provides a proof that no such boundary exists (unless effect too small to detect)?

Assume the fabric of space-time is a volume with a boundary. (this seems to be a possibility). The same way that gravity can be modeled as curvature in space-time around an object, the derivative of which creates a force over other objects close by and pulls them closer, the assumption that...

thanks for the quick reply :)

I hear about the balloon analogy, and that there is no need to say that the universe has a boundary, but is that the only reason or would it be problematic to assume that space-time has a volume and a boundary?