What is there outside of the Universe?
Is there empty space outside the universe?
Could outer space itself have a space? Is there an end to the universe, and if not, is the universe infinite? Is the Universe infinite or is there an end to the Universe? What is space if not a vacuum? What is outer space? Is there a limit for the expansion of the Universe? Could the universe exist without you? Is it true that space isn't expanding, and that that doesn't make any sense? Does the universe exist because no other universes can exist? Was there a space before big bang? Does the Universe exist? Is it possible that the universe is no longer expanding? Is there a center of the Universe? If so, is that center different in any way compared to the rest of the Universe? Does absolute rest or motion exist in the universe? We know universe is expanding but also bodies are attracted by gravity so is it safe to assume that the universe is revolving around something? Does space ever end? Is space time infinite? Could there be a size limit to the universe's expansion? Was space a perfect vacuum before big bang? Is the universe finite or infinite? Is there any imaginary boundary for it? Does the universe have a limit to its expansion? Why is the universe flat? Life Sciences: Is there any another dimension in the universe? If the universe is expanding, is there a centre point which remains fixed? Does 'empty' space consist of 'stuff' which is displaced by matter? Can we cross the border of our universe? What lies at the "edge" of our universe? Does the universe have an edge? Does the universe have a limit to its expansion? If so, what happens when the universe reaches its limit? Why is Space called Outer Space? How vast is the universe?