Where does the universe end?

manic111 said:
That still doesn't answer what the universe expanded into at the time of the "pop"; you're just temporally shifting the question.
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If we analyse by observation, if the pop was such an event that no information was passed through then we cannot answer that question unless we can open a hole an peer through to observe to verify our theories.
That's the reason why knowing if information is lost is important.

D.P. said:
Imagine a 5 dimension cube projected onto a 4 dimensional cube. You can't, but mathematically it is trivial - the same procedure as drawing a 3D cube on a 2D plane.

Just because your feeble human minds are not capable, does not make things impossible.
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If you were projecting 3d into n-dimensions where all the other values remain 0 constantly then it's simple. Take a torus (donut) for example and convert that to n-dimensions and it's a different matter.
 
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Watch some of this on that Universe programme on Sky, apparently, we can only see stuff once its light reaches us here.
Its taken 14.5 billion years for the light from the outer edge of the known universe to reach us travelling, of course, at light speed.
Dont know exactly how fast light travels but it is quite quick.
No one can know whats outside that because the light from stars etc has'nt got here yet.
 
curly_wull said:
Watch some of this on that Universe programme on Sky, apparently, we can only see stuff once its light reaches us here.
Its taken 14.5 billion years for the light from the outer edge of the known universe to reach us travelling, of course, at light speed.
Dont know exactly how fast light travels but it is quite quick.
No one can know whats outside that because the light from stars etc has'nt got here yet.
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It's called an event horizon. We can still estimate the size of the universe.
 
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Id there anything supporting the loop theory?

Assuming the big bang is the correct theory. Then there will be an edge to matter universe. But I don't see why it would just end. After that you would just be flying in total nothingness. Unless more than one big bang happened, then perhaps you have millions of universes with nothing inbetween them.

Lot's of theorys but no one knows where it ends and what happens after that.
 
curly_wull said:
Watch some of this on that Universe programme on Sky, apparently, we can only see stuff once its light reaches us here.
Its taken 14.5 billion years for the light from the outer edge of the known universe to reach us travelling, of course, at light speed.
Dont know exactly how fast light travels but it is quite quick.
No one can know whats outside that because the light from stars etc has'nt got here yet.
Click to expand...

Photons didn't exist in the early ages of the universe anyway as there were no stars. Meaning it's physically impossible to look back more than 14 billion years as there was no light. It's only the Cosmic Microwave Background, which maps the radiation left over from the Big Bang by the temperture differences that allows us to establish what the Universe looked like 300,000 years after the Big Bang.
 
There was a great picture on here that showed the difference in sizes of planets and stars with the names and where they are. Can't find it now but the picture blew me away.
 
If you travel to the end, you will see big gates that are closed off with chains. With a big sign saying NO ENTRY.

Thats how i think of it :p
 
The Universe doesn't end, because there's only one of them. Ergo everything that exists is the Universe.
 
Thought:

If the universie is infinite, then at some point we will all exist again (well, an infinite amount of times) as all the molecules which make us what we are will exist together in the exact same arrangement?
 
scott212 said:
Thought:

If the universie is infinite, then at some point we will all exist again (well, an infinite amount of times) as all the molecules which make us what we are will exist together in the exact same arrangement?
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Thats way over my head! We may be on the 2nd / 3rd run of our lifes ?

De ja vu!
 
Haven't really read this thread.. but if ya wanna really make peoples heads implode..

Has anyone mentioned the string universe theory?? The one Hawkins is trying to get his head around.. as it kinda helps explain the weekness of mavity at the supposed point of creation...
 
scott212 said:
Thought:

If the universie is infinite, then at some point we will all exist again (well, an infinite amount of times) as all the molecules which make us what we are will exist together in the exact same arrangement?
Click to expand...

Does that make us, 'us' again or just a clone?
 
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