# Thread: The infinitely expanding Universe..?

If the Universe is expanding infinitely, what will there be at the "end point" of the Universe?
The atoms and everything the atom forms are just being pulled further and further away, right?
So theoretically, we are being pulled apart right now, aren't we?

I'm not even sure if I think I know what I'm trying to say.

2.

3. One theory states that if you go far enough in a straight line, you'll eventually end up back where you started. The Universe is thought to loop back around upon itself, and it's just the empty space inbetween the galaxies and the clusters that is expanding.

4. Originally Posted by Daecon
One theory states that if you go far enough in a straight line, you'll eventually end up back where you started. The Universe is thought to loop back around upon itself, and it's just the empty space inbetween the galaxies and the clusters that is expanding.
That sounds interesting. But my mind isn't strong enough to process how that would work.

5. The balloon analogy is one way to demonstrate this, if you draw dots on a balloon and blow it up, the dots get further away from each other, yet you can draw a line from one dot all the way around the balloon's surface and end up back at the oringial dot.

Of if you ever played a computer game like Asteroids, where you fly off one side of the screen only to reappear on the other side of the screen like nothing ever happened.

6. I can imagine how that would work in a game, and also the balloon theory, but the Universe isn't a flat surface like the surface of the balloon, is it? It could be a spherical shape, maybe a little squashed at some sides, like a balloon, but how would it work if you had the line pierce into the balloon? Or even away from the balloon?

7. Originally Posted by EugeneT
I can imagine how that would work in a game, and also the balloon theory, but the Universe isn't a flat surface like the surface of the balloon, is it? It could be a spherical shape, maybe a little squashed at some sides, like a balloon, but how would it work if you had the line pierce into the balloon? Or even away from the balloon?
It needs to be noted that the analogy is restricted to the surface of the balloon, which represents the universe; that's why it is strictly an analogy, with given limitations. Also, the surface of a balloon is not flat.

8. Originally Posted by EugeneT
If the Universe is expanding infinitely, what will there be at the "end point" of the Universe?
The atoms and everything the atom forms are just being pulled further and further away, right?
So theoretically, we are being pulled apart right now, aren't we?
Actually the rate that the universe is accelerating at will take hundreds of trillions or even quadrillions (reckoned in the shorter, American way) of years before the universal expansion affects local structures. When it does it will make a Big Rip. But until then it won't make much difference; it's exponential, so most of it won't happen until the last second of that hundreds of trillions of years.

Originally Posted by EugeneT
I'm not even sure if I think I know what I'm trying to say.
You're reaching beyond what we know and trying to understand what we think we know that's beyond what we know.

Don't worry it's good for your mind. Keep doing it.

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