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View Poll Results: What do you think of this theory?
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Me like!
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Dude...you're on crack. Go beat your head against the wall, it'd be more productive.
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Why do you think I care?
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January 4th, 2008, 08:05 PM
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Re: OT: Gravity, Dark Energy, Universal expansion
As far as the universe goes, we havn't even got out into our yard.
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January 4th, 2008, 09:23 PM
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National Security Advisor
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Re: OT: Gravity, Dark Energy, Universal expansion
Quote:
narf poit chez BOOM said:
As far as the universe goes, we havn't even got out into our yard.
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We can barely see the yard. We're still stuck in our crib. 
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January 4th, 2008, 11:20 PM
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Re: OT: Gravity, Dark Energy, Universal expansion
Quote:
geoschmo said:
Quote:
narf poit chez BOOM said:
As far as the universe goes, we havn't even got out into our yard.
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We can barely see the yard. We're still stuck in our crib.
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...So THAT'S why there's so much whining, screaming and hitting going on.
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If I only could remember half the things I'd forgot, that would be a lot of stuff, I think - I don't know; I forgot!
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January 5th, 2008, 02:40 AM
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Corporal
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Re: OT: Gravity, Dark Energy, Universal expansion
If the universe is expanding at the speed of light perpendicular to three-space, then the size of the universe in any direction is increasing at pi times the speed of light. This means that "you can't get there from here" is literally true for most of the universe.
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January 5th, 2008, 04:37 PM
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Major General
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Re: OT: Gravity, Dark Energy, Universal expansion
I think you are on crack because while i understand most of the words you are using, using them in conjuction drives me kinda insane  |
January 5th, 2008, 05:42 PM
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Re: OT: Gravity, Dark Energy, Universal expansion
The universe expands like the surface of a 4D balloon, with the surface being three-space.
But the rub is... not only is the far side of the universe is 'farther away' than the big bang... it is so far away that light from one side will never meet light from the other... an effective 3.1415c receding velocity due to spatial expansion. |
January 5th, 2008, 06:10 PM
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Re: OT: Gravity, Dark Energy, Universal expansion
Quote:
Ragnarok-X said:
I think you are on crack because while i understand most of the words you are using, using them in conjuction drives me kinda insane
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I tend to have that effect on people from time to time 
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January 5th, 2008, 07:01 PM
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Re: OT: Gravity, Dark Energy, Universal expansion
The big bang didn't occur in some particular part of spacetime, but rather it is when everywhere was the all the same place.
It makes no sense to say that something is twice as far away as the big bang.
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January 5th, 2008, 07:10 PM
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Re: OT: Gravity, Dark Energy, Universal expansion
Quote:
Suicide Junkie said:
It makes no sense to say that something is twice as far away as the big bang.
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Yes it does... since in this context time = space (with a factor of c). The big bang was ~20 Billion years ago which makes it 20B*c far away [time] vs the farthest point in the universe which would be 20B*c*pi [space] (1/2 the circumference 2pi*r of the sphere described by r being the time since the BB [*c]). |
January 5th, 2008, 07:46 PM
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Re: OT: Gravity, Dark Energy, Universal expansion
Come on, man.
Its not 20B light years away.
Its 20B years away.
Those are completely different units.
The size of the *visible* universe (roughly, time since photons were released * speed of light) is different from the size of the universe (which depends on its topology)!
Also, you are stating that there exists a farthest point in the universe from somewhere. This implies that you are assuming a closed universe. Why? Evidence indicates a flat or very slightly open universe last I checked.
The crux of the matter is that "speed of light perpendicular to 3-space" is nonsensical, since distance and speed are both undefined for that.
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