Do you believe in Aliens/UFOs?

[KeithD]

We have no idea what is 'beyond' and never will as we'll never see it or be able to measure it.

If infinity exists (as time is a human measurement), then statistically we have already appeared once therefore in infinity we have appeared an infinite number of time in the past, present and future

To Infinity And Beyond ...... which is impossible

[JimOttley]

We have no idea what is 'beyond' and never will as we'll never see it or be able to measure it.

If infinity exists (as time is a human measurement), then statistically we have already appeared once therefore in infinity we have appeared an infinite number of time in the past, present and future

To Infinity And Beyond ...... which is impossible

Actually Georg Cantor proved that infinities come in different sizes don't ask me how it works I don't pretend to understand it

http://en.wikipedia.org/wiki/Georg_Cantor

In one of his earliest papers, Cantor proved that the set of real numbers is "more numerous" than the set of natural numbers; this showed, for the first time, that there exist infinite sets of different sizes.

[KeithD]

Actually Georg Cantor proved that infinities come in different sizes don't ask me how it works I don't pretend to understand it

http://en.wikipedia.org/wiki/Georg_Cantor

We were talking about an infinite Universe which is as yet unproven .... you can count to infinity if you live long enough

[JimOttley]

We were talking about an infinite Universe which is as yet unproven .... you can count to infinity if you live long enough

Fair enough :P

If there is enough matter to close it, it then it's not infinite but as you know there is not enough observed matter to come anywhere near closing it, so chances are it will expand forever in which case it's infinite.

However with the accelerating expansion that has been observed and the possibility of the big rip at some point in the future then once again it's not infinite.

So as you say it's unproven.

It's always struck me that the big rip sounds like a black hole singularity turned inside out, everything comes to an end over a huge volume of space. In a conventional back hole all the stuff falls in over a large'ish surface and gets squashed out of existence at the point singularity.

In our Universe everything seems to have got squeezed in via a point and is going to hurtle towards extinction over a huge 4 dimensional area, just a thought, never seen this particular thought regarding the big rip published.


Jim