Everytime I think about the universe expanding I can't help but think to myself, "so what is outside of our universe?", based on our concept/understanding of things, there must be something outside of it but that is one scary rabbit hole to go in because then you have to ask what contains whatever is outside of our universe and what's containing that and so on and so on...terrifying thought! via unexplained-mysteries: There is much we still don't understand about the universe's expansion. New data from the Hubble Space Telescope has shown that the universe is expanding faster than expected. Known as the Hubble Constant, the rate at which the universe is expanding was previously determined by studying the cosmic background radiation left over from the Big Bang. By using data from the European Space Agency's Planck spacecraft, physicists calculated that the actual expansion rate was approximately 67 kilometers per second per megaparsec. Now however, a team of researchers using data from