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instantcoffee4u
Guest
hey,<br /><br />i was reading the articles about the expansion of the universe after the big bang and how scientists believe the universe will eventually expand faster and faster until we can't see any other galaxies because they'll be moving too fast and be too far away.<br /><br />my question is this: how can we definitively say that the universe is expanding and base this assumption on the fact that photon radiation is visible at the edges of the universe when theoretically, since we're already out of range of hundreds of thousands of galaxies/matter because they are moving at an infinite and exponential light year's pace away from us, the photons then wouldn't be at the edge of the universe, just at the edge of the longest distance we can detect? Maybe they are moving further away from us, but the actual reaches of the universe are contracting/staying the same?