Dark energy could it be "light energy"?

[xelasnave]

There is speculation that there exists a "force" in the Universe that is causing it to expand.
Astronomers observe the expanding Universe.. Dr A had followed a path where he worked on the prospect of a cosmological constant, which he interpreted as a repulsive force, to keep the Universe in balance (at that stage it was thought the Universe was static) ...
There are three propositions for dark energy from recollection and Dr As cosmological constant is but one... he did pull back on the idea stating that it was his biggest blunder.. there are folk who know say it was not a blunder at all... personally I think it may have been his greatest inspiration.

Anyways any ideas on where this dark energy comes from.. I wonder if it could somehow be the "push" energy of all the light in the Universe..imagine if light could push it is easy to imagine such could be the source of dark energy.

I know there will be good reasons why this can not be so but it something that even the greatest minds are at a loss to tie down so we are duty bound to help...so any ideas???


alex

[xelasnave]

I think this is what folk are trying to point out to me when I raise these ideas

Eddington once said, if your theory doesn't agree with the observations, don't worry.

The observations are probably wrong.

But if your theory doesn't agree with the second law of thermodynamics, forget it.

alex

[g__day (Matthew)]

I think rather than any new natural force or particle is posited we should rule out exotic geometry arising from the big bang as being the prime culprit. The more I consider it the more I'd look for effects to the spacetime framework itself, rather then forces acting within it.

[glenc (Glen)]

http://www.skyandtelescope.com/news/36372969.html
"Throw a baseball up toward the sky, and gravity will slow its travel from the moment it leaves your hand. For decades, astronomers assumed that the post-Big Bang universe worked the same way. Even though galaxies are flying apart as space expands, their motion should be decelerating as the eons go by, due to the pull of their gravity on each other.

But a decade ago, cosmologists discovered something totally unexpected. The expansion of the universe has not been slowing down but speeding up in the past few billion years. It's as if the baseball you threw upward, instead of slowing down, suddenly sprouted a rocket engine and took off toward the clouds.

Something akin to anti-gravity — dubbed "dark energy" for lack of a better term — has apparently been inflating space. The evidence? Extremely far-off galaxies are traveling away from us at the wrong speeds (as measured by their redshifts) for their distances (as measured by the brightnesses of supernovae within them)..."

[GeoffW1 (Geoff)]

Originally Posted by xelasnave

There is speculation that there exists a "force" in the Universe that is causing it to expand.
...so any ideas???


alex

Hi,

I want to see if that Higgs Field exists. If so, then there may be a particle which feels this field in the manner of an anti-graviton - anti-gravity!

There may be more than one anti-graviton as there are more than one of other sorts of bosons, eg those for the electro-weak force.

Then we could have a force which is weak over short distances but stronger over long distances, and more effective over the sorts of huge distances from us to the observational horizon.

So, when the universe was young, this force was not so effective, but later, became observable. It is a bit like my waistline really.

Cheers

[TrevorW]

May the force be with you

[xelasnave]

It is a very interesting area GeofF I like it because even the folk who understand it dont really understand it..by their admission not my judgement ..lot of work going on with it thats for sure...

I think the more you look at it the more you figure there must be heaps going on in the emptiest part of space.
I was thinking today of all the "particles" whatever they are that comes from say a distant galaxy..I dont exactly understand the standard model to be honest but if radiation comprises of one part in a thousand a HB particle you have a pretty good field that fills the universe..from a mechanical view point...
I tried to build a grid (mentally) geometricaly to house ever particle in some reference to analyse the opportunity of some particle, energy..whatever passing that point ..(each grid making the plank scale look like a foot ball field) and all you can say is the probability is infinite within a certain span of time that a bit of everywhere will pass by at every tragectory within that grid reference... the probability of a bit of matter being there is not infinite...
It would make sence a massive underlay of particles and that may be our dark matter ..I dont know ...but to some degree as much as it sounds silly the old Greeks conceptualised it very well ..their eather their atom ...
I do think at a larger scale this dark energy may hold galaxies "externally" as it would seem internal attraction..in my humble opinion wont do it..
But I will give that a rest/
alex

[Jen]

you think way too much Alex

[xelasnave]

Its the dogs they put these crazy ideas in my head in the first place its all they talk about
alex

[Jen]

Originally Posted by xelasnave

Its the dogs they put these crazy ideas in my head in the first place its all they talk about
alex

[xelasnave]

I only started thinking a short while ago so its new to me and I give it a bit of a go..like a new toy if you see what I mean...I am very impressionable so I read something and I can not stop dont really learn anything ...
AND this weather cabi9n crazy to the max.
alex