Space - is it infinite?

Yeah been a while since I studied this. I don't know what the time difference would be and i'm not sure if I got it right in my previous post, but quite a bit of time difference :) Google might have some answers, but as its all theoretical only anything would be a guess

- Pea0n
 
Zefan said:
He explained that it would be the reverse, people inside the craft would age at slower than normal.
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Am I mis-wording it again? lol. I know that you would have aged slower in comparison to the rest of the universe, you would only have aged four years. What I am asking his how much older everyone else would be once you reached your destination.

If it's a significant difference then it'd be a good way to "travel to" the future assuming you could solve the mass issue.
 
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I often wonder this... is it like as you get past everything will there be like a wall... or would you just explode because there isn't a space left... I suppose we will know one day but not in our lifetime :p
 
Impossible to tell!

Most scientists will use light to calculate a distance. They use the speed of light vs the distance of the object, but as there's a limit of how far we can actually look, it's impossible to tell how far space is and if it goes on and on and on and on.

The brain unfortunately cannot calculate certain things. It's like the question "try to imagine nothing".
 
*Head Explosion* just by thinking about this :(
I mean you are literally thinking about infinity of "nothing" (dark energy/space?). I guess it's easier to think about it if presume it's 'round' like the Earth. But then what's outside this sphere?

Oh my days. We're just so minuscule.... such a negligent dot in the universe...
Why do we even exist?
 
Ulfhedjinn said:
Am I mis-wording it again? lol. I know that you would have aged slower in comparison to the rest of the universe, you would only have aged four years. What I am asking his how much older everyone else would be once you reached your destination.

If it's a significant difference then it'd be a good way to "travel to" the future assuming you could solve the mass issue.
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My understanding is that if you are travelling at the speed of light then you will not experience the passing of time in your frame of reference. So in your frame of reference the journey will be instantaneous and you will not age. To an outside observer in a frame of reference that you are moving at the speed of light relative to then your journey of the specified 4 light years will appear to take 4 years and the outside observer will age 4 years during your journey.
 
Inazuma said:
*Head Explosion* just by thinking about this :(
I mean you are literally thinking about infinity of "nothing" (dark energy/space?). I guess it's easier to think about it if presume it's 'round' like the Earth. But then what's outside this sphere?
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The universe could be like the Earth's surface. The Earth's surface appears to be a flat, 2D object but if you go far enough you get back to where you started. The universe could be a 3D surface, on a 4D sphere.
 
spp said:
Truth is no one knows if the universe is infinite. The standard model of cosmology puts the curvature of the universe to be about 0, which is a flat universe (infinite). For all my computer simulations modeling dark energy I set the curvature of the universe to be zero.

As for 4% of the universe being made of atoms, that's correct, at least from an observational pov. It appears that the 70% of the energy density of the universe is in a form known as dark energy (an area I work in), and 26% is in the form of a non baryonic source, dark energy (here baryonic refers to baryons and leptons).
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So, we seem to have vaguely grasped the concepts of matter and dark matter. Now, dark energy? It seems this term refers to everything out there that we just don't understand?
Is there any way you could elaborate on exactly what it is or what you would be measuring?

What do your simulations involve? Modelling formation of galaxies from the early universe? or star and galaxy motion as we observe it now and trying to find out what kind of forces would be required to make this work? or.....?
 
Watch Hawkings Universe on 4oD, has some amazing theroies on there. Once it gets to explaining string theories, and Multiverses (multiple universes) and the possibilities of 11 Dimensions, that should help answer your question, but add even more at the same time :p lol.
 
Dark_Angel said:
Um... I wasn't comparing it to a balloon, I was just using a balloon to explain something that is a certain size now, is finite, and is changing :p
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The contradiction was that some people believe it to be infinite, and growing. Something that is infinite cannot grow - it is already limitless.
 
If our universe is just one of many universes in a vast expanse of nothing, then what is this nothing? Why does this nothing exist? Why are there explosions (big bang theory, etc) within this nothing that become universes and later harbor life?

Answers on a postcard...
 
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