Cosmologist call our Universe finite but unbounded. Einstein showed that spacetime was created with our Universe(though he did not know this at the time). The Universe does not exist within a separate space, it IS spacetime. The estimates I have seen is that the Universe is currently about 43 billion light years in size but this gets kind of weird because there are no edges(that's what unbounded means, no boundaries). The even weirder thing is we can currently see all of it, even though we see it as approximately 28 billion light years in size(the photons we see were released from the material ~13.5 billion years ago but that is from both sides of any straight line drawn through Earth). It has grown substantually since then, we just can't see it in the present and some of it has passed over the light horizon by now(IE the stretching space between us and them means we are traveling faster than light relative to them and vice versa). IOW if you started travelling in any direction at the speed of light(the Universes speed limit)you would never reach the farthest galaxies we can currently see as they are receeding from us faster than light(at the present moment, despite appearances of their current speed). The weirdest thing of all is that every atom in your body was once at the exact position of the Big Bang and that is true for every atom in the Universe. And what we see 13.5 billion years ago/away spread out over the sky once occupied a space smaller than a hydrogen atom. Just sayin'. GrumpyPlease Register or Log in to view the hidden image!