and i challenge you to prove it by posting an actual picture of dark matter
Last edited by Locoloki (2006-11-18 11:21:34)
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This video (49 min) explains the Universe expansion and the Dark Matter as well. It's very interesting if you have the time to watch it.
There you go.Locoloki wrote:
and i challenge you to prove it by posting an actual picture of dark matter
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everyone knows every action has and opposite and equal reaction, so if the universe is expanding, it has to be coming from somewhere, maybe the universe isnt expanding, were just getting further from the center
I get what you mean. Sorry I thought you meant the density of celestial bodies, as in how close stars etc are to one another - I thought that seemed like a strange statement to make. But then I don't think you're right anyway because the forces would be so miniscule they wouldn't overcome the electromagnetic and nuclear forces which are much more powerful than gravity on the smaller scale.jonsimon wrote:
But the increased space between celestial bodies would decrease the gravitational pull of all other celestial bodies on the matter of, for example, the earth. Meanwhile, the earth's gravitational hold on it's own matter would remain constant.Bertster7 wrote:
You're right. But I'd think it would be the other way round, density of celestial bodies getting less as there is more space and the same amount of celestial bodies.jonsimon wrote:
If the universe is expanding, shouldn't things be relatively uneffected? I mean, distances between celestial bodies should increase marginally, but for the most part, things in our neck of the woods shouldn't change much, the distance between our sun and our planet shouldn't be greatly effected (relative to the overall expansion of the universe) and celestial bodies should be the slightest bit denser as a result of the miniscule change in the gravitational pull of other bodies, but otherwise, I don't see any immense implications.
While matter does have a tendency to diffuse, the gravitational pull of earth is currently enough to suppress that tendency, so unless more empty space somehow increases matter's tendency to diffuse (which I don't think it does?) earth would become marginally denser.
you make about as much sense as a preacher
There are three theory's that can't be know if true yet, they are:Erkut.hv wrote:
In theory, my theory anyhow, the universe expanding would eventually lose the ability to sustain it's momentum. It would thin itself out so much from expanding, that it will eventualy start being pulled back into itself. When that happens, all the mass gets pulled back into the center, until it can't be contained any further. Then....cpt.fass1 wrote:
So basically it's somewhat proof that the explosion of a supernovia is what causes space to expained and not collapse on itself due to gravity..
I'm not really too much into the whole "Space" and where we come from stuff so I was hopeing for someone who was to expaine theory's a bit better.
Big bang all over again. Then everything gets created, again.
The question still remains:
What created the stuff in the first place? And if my theory holds, how many times has it happened? And if energy can neither be created nor destroyed, simply transferred, what the hell was I before I entered this shell? Or the last time I was in the universe before it imploded.
My head hurts, thanks guys.
Closed - Gravity may turn out to be a little too strong and cause the universe to collapse in on it's self.
Open - Gravity may turn out to be a little too weak meaning the universe keeps expanding forever and becomes inert and dead.
Flat - Gravity is perfect and will allow the universe to be held together at just the right dimensions to allow things to go on forever.
That wouldn't fit in with Hubbles observations.Locoloki wrote:
everyone knows every action has and opposite and equal reaction, so if the universe is expanding, it has to be coming from somewhere, maybe the universe isnt expanding, were just getting further from the center
I think the point is that the rate at which things are moving apart is increasing which requires some form of energy to achieve.Bertster7 wrote:
That wouldn't fit in with Hubbles observations.Locoloki wrote:
everyone knows every action has and opposite and equal reaction, so if the universe is expanding, it has to be coming from somewhere, maybe the universe isnt expanding, were just getting further from the center
The point I was responding to was the:.:XDR:.PureFodder wrote:
I think the point is that the rate at which things are moving apart is increasing which requires some form of energy to achieve.Bertster7 wrote:
That wouldn't fit in with Hubbles observations.Locoloki wrote:
everyone knows every action has and opposite and equal reaction, so if the universe is expanding, it has to be coming from somewhere, maybe the universe isnt expanding, were just getting further from the center
point.maybe the universe isnt expanding, were just getting further from the center
Hubble observed that the universe IS expanding, so that statement would not fit in with his observations. The universe doesn't need to use energy to expand, just to increase the rate.
The rate may be increasing, that is still something astronomers are undecided on. That would require energy to perpetuate the acceleration. That energy is dark energy. I am not very familiar with the Lamda-CDM models though and don't really know enough detail about it to properly comment.
Although I would expect that the diminishing density of matter and dark matter in the universe (since it's getting bigger) would lead to diminished gravitational attraction. The balance between these two repulsive and attractive forces (I know that's not an accurate description, but it gives a clearer picture of how many scientists believe they work) is what determines the rate of expansion (or reduction) of the universe. As the gravitational attractive forces are reduced (due to the increased size of the universe) the balance changes so the 'repulsive' dark energy has a greater effect. This would lead to an increase in the rate of expansion without any changes occuring within the universe other than it's size increasing.
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