So What Is The Universe Expanding Into?

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We are told that scientists believe that the Universe started with the Big Bang and then started to expand outwards. We know the Universe is expanding because we can see galaxies slowly moving apart. Here is another attempt to answer the question, if the Universe is expanding then what exactly is it expanding into?

The theory of special relativity states that objects cannot travel faster than the speed of light relative to each other, however there are no such constraints on how fast space itself can expand. So it is possible for two distant objects to appear to be expanding away from each other at faster than the speed of light. If parts of the Universe are expanding at greater then the speed of light then those parts can not be seen by us so the entire Universe maybe far bigger than the observable Universe.

God’s Equation: Einstein, Relativity, and the Expanding Universe
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