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Diagrams of three possible geometries of the universe: closed, open and flat from top to bottom, corresponding to a density parameter Ω0 which is greater than, less than or equal to 1. The closed universe is of finite size and, due to its curvature, traveling far enough in one direction will lead back to one's starting point. The open and flat universes are infinite and traveling in a constant direction will never lead to the same point.Permission of NASA Official: Gary Hinshaw
That one confuses me LeeE? "but if the extent of time is infinite and has no end then the universe too is essentially infinite in extent, even if it might not yet have extended to infinity."Topologically you can have different 'shapes' to a universe it seems to me without therefore limiting 'time'? Or am I misunderstanding it?
Did this make sense?
Has the thought ever occurred to anyone that the answer to what lies outside our Universe may be found in what caused the BB in the first place?
What I would like to know is what defines the external boundary of space and the universe? For example if the universe is 14 billion years in age, what lies beyond the void? Does it have potential for matter to exist there and thus just the same like the space here? Or is it a physical/non physical thing that prevents light from going further? I have read journals positing that there is no edge and light would end up at the other side like a spaceship going out one side of the screen in a computer game, although I believe that might have been in connection with string theory. So what is the current astronomical/physics view on this?