Time?

**Yuhaney** · 09-28-2012, 07:39 PM

(09-28-2012, 07:38 PM)BAndrew Wrote: Of course if it is expanding it is VERY VERY BIG! and I am just gonna leave it with that, but that doesn't mean it's infinite.

It doesn't, yes. But I like to believe so.
Why would it just end..?

**Robby** · 09-28-2012, 07:39 PM

(09-28-2012, 07:33 PM)KingWolf Wrote: The entire thread.

You're not the only one. Even though I am a rocket scientist, I still have the tendency to get confused.

Now, let me re-route the photonic energy for my research.

**BAndrew** · 09-28-2012, 07:41 PM

(09-28-2012, 07:39 PM)Scraper Wrote:
(09-28-2012, 07:38 PM)BAndrew Wrote: Of course if it is expanding it is VERY VERY BIG! and I am just gonna leave it with that, but that doesn't mean it's infinite.

It doesn't, yes. But I like to believe so.
Why would it just end..?

What if the universe is like a sphere? You can never go in a straight line due to spacetime and you will always and up doing circles (kind of).

**Robby** · 09-28-2012, 07:43 PM

(09-28-2012, 07:41 PM)BAndrew Wrote: What if the universe is like a sphere?

Geoid shaped, like Earth? Well, you'd do circles in that case.

**BAndrew** · 09-28-2012, 07:43 PM

Also how can something infinite expand? It is already infinite.

**Robby** · 09-28-2012, 07:43 PM

(09-28-2012, 07:43 PM)BAndrew Wrote: Also how can something infinite expand? It is already infinite.

We don't even know if it is infinite in the first place.

**BAndrew** · 09-28-2012, 07:46 PM

(09-28-2012, 07:43 PM)Nemet Robert Wrote:
(09-28-2012, 07:41 PM)BAndrew Wrote: What if the universe is like a sphere?
Geoid shaped, like Earth? Well, you'd do circles in that case.

Yes, but I must mention here that we are talking about SPACETIME + other dimensions we do not even understand (not just space like Earth) so given that and the size of the universe we could never see any "curverture".

(09-28-2012, 07:43 PM)Nemet Robert Wrote:
(09-28-2012, 07:43 PM)BAndrew Wrote: Also how can something infinite expand? It is already infinite.
We don't even know if it is infinite in the first place.

I made the hypothesis that it is infinite and I end up with this "paradox".

**Robby** · 09-28-2012, 07:47 PM

(09-28-2012, 07:46 PM)BAndrew Wrote: I made the hypothesis that it is infinite and I came up with this "paradox".

Now I'm confused as hell. NYO!

**BAndrew** · 09-28-2012, 07:51 PM

(09-28-2012, 07:47 PM)Nemet Robert Wrote:
(09-28-2012, 07:46 PM)BAndrew Wrote: I made the hypothesis that it is infinite and I came up with this "paradox".
Now I'm confused as hell. NYO!

OK let's take it from the start.

Suppose that the universe is infinite. (We take it as fact even though it might not be true)

This means that something that it is infinite it is expanding (doesn't make sense).

This is something like Reductio ad absurdum technique in mathematics.

**Yuhaney** · 09-28-2012, 07:55 PM

BAndrew,

How can you say it's infinite if your theory says it's sphere-like.
Take word "Space" as an example. If you start your journey from S and end it in E, that would mean it has a start and end. You would just start the circle again from S and end it again into E.
In this case, it's not infinite. It's just doing circles.