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Quote: if a spaceship set out from earth, it would eventually circle around through the fourth dimension and come back to earth
Politics is full of test subjects. I say we try it. 
There are only 10 types of people in the world, those who understand binary and those who don't.
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Lol. Interesting to note that there's no joke icon on your message... 
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Also note my sinister smile.
There are only 10 types of people in the world, those who understand binary and those who don't.
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RyanDev wrote: Perhaps light disperses enough that at such distances we can no longer see it?
perhaps - but there is not evidence to suggest that individual photons 'diminish' over distance. Obviously teh light in general diminishes as it is spread out into an ever increasing sphere.
RyanDev wrote: Space must go on forever, right?
Not 'must'. Intuitively that's how we think, but it's not necessarily the case.
Much of the issue is in the terminology, really.
Whether you subscribe to the big bang, or the god made everything theory, you tend to talk about 'before'. But if space-time was created at some point, then time was created, so there is no 'before'
As for the wall, well, if the speed of light in a vacuum truly is an absolute and it is just not possible to exceed it, then from an individual's point of view the universe is finite with a radius equal to (C x age of the universe) because any information from father away than that is impossible to receive.
As distant galaxies more away from us faster than C, the size of the observable universe is essentially finite - just because we can't possibly, ever, see beyond it.
One could imaging being born an a planet right on the 'edge' of the observable universe, and could ask what you would see if you looked away from the origin of the big bang - but my understanding (which could be way off) is that there just isn't such an object. Wherever you are you will see everything expanding away from you - so nobody is sitting at the edge, looking at a big blank wall.
RyanDev wrote: Fun to think about.
true Dat (as the kids say)
RyanDev wrote: I'm going to go start counting the stars.
Good luck with that!
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perhaps - but there is not evidence to suggest that individual photons 'diminish' over distance.
Redshift? There is a velocity based interpretation of that but it could also be interpreted as photons losing energy over time, or a combination of the two. Perhaps they decay by splitting off a low energy photon and that's the microwave background.
We wouldn't see anything in experimental situations because the effect, if it exists, is so small. There's no evidence for gravity waves either but that doesn't stop us spending billions on designing and building detectors designed to see them.
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You're right, of course.
The fact that we see red-shifted light with the shift proportional to the distance over very large distances ties in nicely with an expanding universe, but could be caused by tired photons, or something else entirely.
As for gravity waves - didn't they find evidence recently?
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The expanding universe, coupled with its finite age, means that we're not looking into an infinite regression of starlight. Beyond a certain distance, the light either hasn't reached us yet, or is so much red shifted that it isn't visible light anymore.
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Quote: I'm going to go start counting the stars.
Good luck with that 
[Flags]
public enum Bool {
True, False, ForSure, Maybe, ProbablyNot, Depends, NotDecidedYet, Undefined
}
private interface IShy { }
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575, 576, 577. Ah, please don't interrupt me. I'll have to start over. 
There are only 10 types of people in the world, those who understand binary and those who don't.
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Sorry, you were at 578.
Didn't you miss a couple of them in Orion's Constellation? Ok, ok, I quit...
[Flags]
public enum Bool {
True, False, ForSure, Maybe, ProbablyNot, Depends, NotDecidedYet, Undefined
}
private interface IShy { }
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It's sunny now. I'll have to pick it up tonight where I left off. Luckily they don't move around.
There are only 10 types of people in the world, those who understand binary and those who don't.
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Nope - not even close.
Someone you really wouldn't think of (or, more accurately, I wouldn't have thought of)...
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Tell me what thy lordly name is on the Night's Plutonian shore!
Quoth the raven, "Nevermore."
Haven't read anything by him in years!
Hmm...is he available in ePub...?
Those who fail to learn history are doomed to repeat it. --- George Santayana (December 16, 1863 – September 26, 1952)
Those who fail to clear history are doomed to explain it. --- OriginalGriff (February 24, 1959 – ∞)
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Deep into that darkness peering, long I stood there wondering, fearing,
Doubting, dreaming dreams no mortal ever dared to dream before!
I'd give you an up-vote for your jolly Welsh cleverness - but you have far too many points, so I'll randomly up-vote another post in a charitable act on your behalf!
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_Maxxx_ wrote: I'll randomly up-vote another post in a charitable act on your behalf!
 A charitable donation! Hopefully, it will go to feed a homeless blind victim of pope-abuse. 
Those who fail to learn history are doomed to repeat it. --- George Santayana (December 16, 1863 – September 26, 1952)
Those who fail to clear history are doomed to explain it. --- OriginalGriff (February 24, 1959 – ∞)
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Who cares who said it? It's obvious to a casual observer that random patches of dark matter are drifting about, sucking up spots of starlight that would otherwise be plainly visible.
Will Rogers never met me.
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Roger Wright wrote: random patches of dark matter
But are you sure it's random?
Bahhh bahh Baahhhhhhhhhhhhhhhh!
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Roger Wright wrote: dark matter are drifting about
I've never seen Dark Matter drifting.
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That's because it's dark, and prefers to move about at night.
Will Rogers never met me.
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Edwin Hubble?
“That which can be asserted without evidence, can be dismissed without evidence.”
― Christopher Hitchens
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Nope.
OG got it above ^
(though I bet he googled!)
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Nah - I visit QA, and you aren't allowed to google if you go there... 
Those who fail to learn history are doomed to repeat it. --- George Santayana (December 16, 1863 – September 26, 1952)
Those who fail to clear history are doomed to explain it. --- OriginalGriff (February 24, 1959 – ∞)
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Easy. Paris Hilton in her famous treatise "Thoughts rattling around the empty spaces"
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That's the first verse of Firework by Katy Perry.
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