Thought about Space

kwerk

kwerk

kwerk

Wise Guy
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If when you look through a telescope at distant galaxies, what you see happened millions of years ago because the speed of light is quite slow.

The universe is also expanding so the galaxies are getting further away. Eventually they will be so far away that it will be too far for even light to reach us. If you think of the speed of light as the maximum speed of information transmission, no information could be exchanged with those galaxies.

In effect those galaxies are now in separate universes. It's beyond the range that information can be exchanged with our one so they cant effect each other.
 
Universe isn't spaced based on how far information can travel though.
Lets call us the Alpha Quadrant and them Beta, Delta onwards :p
 
Morba said:
Universe isn't spaced based on how far information can travel though.
Lets call us the Alpha Quadrant and them Beta, Delta onwards :p
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Well it's sort of a way to conceptualize a multiverse. It's still in "our" universe but there is no possible way to see it, or affect it, it's completely isolated. There is no causal interactions possible between them not even on a quantum level. It might as well be another separate universe.
 
kwerk said:
Well it's sort of a way to conceptualize a multiverse. It's still in "our" universe but there is no possible way to see it, or affect it, it's completely isolated. There is no causal interactions possible between them not even on a quantum level. It might as well be another separate universe.
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How are they completely isolated? Meteors/comets/spaceships could still travel to/through them?
 
i did a similar thread on this a few months ago but can't for the life of me remember what point i was making was now :embarrassed
 
kwerk said:
Eventually they will be so far away that it will be too far for even light to reach us.
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Assuming no annoying interactions conservation of energy says this is just wrong. It might be in the radio spectrum when it gets to us but it'll still be a photon from the far side of the universe.
 
Here's a question. If light is continuing to go further, is that what is allowing us to see more of the universe than before or is it really just technology that is helping us?

Do we see more because the light is lighting up more of the universe?
 
SlyReaper said:
No they couldn't. They would have to be moving faster than light. Google "cosmological horizon".
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OK, I didn't understand any of that, but is it something like, if the objects are far enough apart, then due to the rate the universe is expanding, it would be impossible to ever reach the other object, since your galaxy and the other galaxy are constantly moving apart (so like running on a treadmill)?
 
King Damager said:
What about this though.

http://forums.overclockers.co.uk/showthread.php?t=18443160

kd
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That gets more in to time/relativity. I don't actually believe the galaxies are moving apart, I believe the distance in between them is actually being stretched out relative to where matter exists. If you imagine space as a 3D lattice of planck length degrees of freedom, matter compresses them which we see as mavity. According to holographic principle there is a finite number of points on the lattice though, so they get pulled from somewhere else which gets stretched out and runs at a different time speed. Entropy is the process of gobbling up these degrees of freedom so to speak.

If you can compress/stretch space like this drive does, then you could jump through space (actually more like time) very quickly.

I wonder if the stretched part reaches a point where it just "snaps" and breaks off to a new universe. The degree of freedom becomes so stretched that information cant jump across. That would be the holographic horizon.
 
kwerk said:
I wonder if the stretched part reaches a point where it just "snaps" and breaks off to a new universe. The degree of freedom becomes so stretched that information cant jump across. That would be the holographic horizon.
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Like a lava lamp?
 
Morba said:
Here's a question. If light is continuing to go further, is that what is allowing us to see more of the universe than before or is it really just technology that is helping us?

Do we see more because the light is lighting up more of the universe?
Click to expand...

Not really it's just down to telescopes with ever larger 'mirrors' that are able to detect fainter and fainter sources from further away.
 
makes me wonder what would happen to the earth is they actually built that drive and revved it up. I think it would have to be started up in deep space, because for the space it compresses there is a corresponding part stretched.
 
RationalGaze said:
How are they completely isolated? Meteors/comets/spaceships could still travel to/through them?
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Eventually it would get "stuck". Basically the part of space it enters is expanding faster than time can exploit. Imagine jumping out of a plane, but the ground is moving away from the plane faster than you are falling.
 
kwerk said:
I don't actually believe the galaxies are moving apart, I believe the distance in between them is actually being stretched out relative to where matter exists.
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How could you tell one from the other with no frame of reference?

kwerk said:
If you imagine space as a 3D lattice of planck length degrees of freedom, matter compresses them which we see as mavity.
Click to expand...

'Space' has a minimum of 4 dimensions and if string theiory is correct many more than that. A Planck length is defined as the smallest discernible unit length in the universe. Smaller than a Planck length is meaningless. So what would compressing it mean?
What about anti-matter does that expand your Planck lattice?
 
kwerk said:
Eventually it would get "stuck". Basically the part of space it enters is expanding faster than time can exploit. Imagine jumping out of a plane, but the ground is moving away from the plane faster than you are falling.
Click to expand...

Assuming you are correct about the 'space' expanding rather than other perfectly good theories.
You are assuming that the expansion of the 'space' can be faster than the speed of light, when there is no evidence to suggest either way. Yes its not governed by E=γMC^2, but the universal speed limit could still apply
 
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