Jeff7
Lifer
That may be what "dark energy" is - perhaps it's simply some inherent property of space, similar to a gas, that it doesn't like being near itself, so it continuously expands. In this case, it's kind of acting against what friction would normally do, instead serving to speed up expansion.Originally posted by: Jeff7181
Now, since the Universe is all inclusive... there's no additional energy to add... so eventually, the expansion should stop, and the contraction should begin. That is of course assuming there is no "friction" in the form of another dimension or something like that...
I've heard the expansion likened to what happens when a chocolate chip cookie is baked. The dough is space, and the chips are pieces of matter. Through no energy input of their own, the chips still move apart as the "space" around them seemingly expands.
Well, whatever there is outside of this spacetime bubble, that's what it's expanding into. 🙂*EDIT* On a similar subject... if the Universe is everything/everywhere, how is it expanding? What is there for it to expand into? Lets assume there is an edge, but it's expanding at the speed of light... if I could find a way to exceed the speed of light, could I see outside the Universe, or by doing so, have I just expanded the Universe?