dark energy speeds up the expansion of universe?

Question

so, what the hell is dark energy? and einstein said its not a anti-gravity energy which modern scientists disagree, is that true as well?

lol, i mean einstein said it is anti-gravitational energy which modern scientists disagree

Answer 1

Until a decade ago, it was believed that gravity must still be slowing the expansion that began with the Big Bang. Since then, observations of supernovas have shown that the expansion rate is slower as you look farther away (in comoving coordinates); farther away means longer ago, because it took longer for the light to reach us. Therefore, most scientists agree that the expansion is accelerating. To explain this, they invented the idea of dark energy.

I have two ideas of my own on this subject. I'm afraid both are pretty complicated.

First, in my own Fractal Foam Model of Universes, space expands because the ether is a foam whose bubbles are un-popping. Too complex to explain here. Read my blog (link below).

Second, I am skeptical about the validity of the comoving coordinate system (2nd link below). Somebody decided that special relativity does not apply to the "apparent" relative motion which results from the expansion of space. In effect, they made up a new set of implicit definitions of distance and time.

The SR formulas are Δr' = Δr/γ, and Δt' = Δr/γ
where γ = 1/sqrt(1-v^2/c^2).

Actually, you can redefine either distance or time without invalidating special relativity; that is equivalent to applying a mathematical transformation to the SR formulas. That transformation makes Δr' = Δr; in other words, it eliminates the relativistic shortening of space by definition.

The definition of comoving coordinates also makes Δt' = Δt. But if SR does shorten space and dilate time because of the "apparent" relative motion due to expansion, then the transformation which makes Δr' = Δr must make Δt' = Δr/(γ^2), not Δt' = Δt. Negating the shortening of space by definition must double the effect of dilating time.

If I am right, then distant clocks do run slower because of relativistic time dilation, and therefore, the Hubble expansion is also slower at great distances. This is not because the expansion is slowing; it is because of the SR time dilation. Therefore, dark energy may not be needed to explain the non-existent acceleration of the expansion.

Answer 2

Well, scientists agree that dark energy exists, they just can't prove it yet. When Einstein first began theorizing on the concept of an anti-gravity energy, it was merely an attempt to prove his theories of relativity flawed, because he hated the thought that the universe was not static or infinite. There was too much math. It gave him headaches. That being said, he eventually gave up on the anti-grav hypotheses, unable to disprove relativity and space-time.

Anyways, it is assumed that dark matter is indeed accelerating universal expansion. Science is highly interested in what this means exactly, because relativity states that the faster the something moves, the heavier and more stretched out it becomes, and the more energy is required to maintain its current rate of velocity (much less increasing that velocity). Well, the laws of conservation conclude that energy is constant, neither created nor destroyed. It has been that it can, however, become lost. This is the case of dark stuff. Of energies, science can't account for about 74% (give or take) of all energy in the visible universe. It's there, they know that much. They just can't prove it. Ironic? Maybe not.

Answer 3

Dark Energy stems out of the Einstein cosmological constant called lamda.

Lamda =8pi x G/C^4 x the Energy(dark) per unit volume of Space.It is measured in per Unit area=meter^-2.

Thus the curvature of Space of the whole Univeres would boil down to the square root of the cosmologial constant.

Hence if dark energy exists, then there must also exist dark matter which is the cause of the Power that exists in space locked in as space as energy per unit volume of the dark matter.
Is the Universe expanding or is it just Galaxies that are moving to reach Gravitational equilibrium. That is the dilemma and question of disagreement.
If that is the Case than Dark Energy per unit time would be the cause of motion of the Galaxies in the Universe,a well as all gravitational phenomena.

Its very vely simple

A far a theory is concerned neither Quantum Mechanics nor General relativity agree.Hence they should both be taken with a grain of salt as far as judging which theory represents Reality. As there is nothing absolute in the world of science.
All our formulae and equations are only approximations.

Answer 4

Dark energy is a loose definition for what is out there that we can't identify or measure, but we know it has to be there. It's highly unlikely it has anything to do with anti-gravity just like its unlikely there is an anti-energy. Gravity is one of 4 basic forces and is already associated with electricity. A dipole type energy is not consistent with any theory.

Answer 5

I believe this is the same as "Exotic Energy" the energy that has the ability to open up Worm Holes in space. Exotic Energy is Anti-Gravitational Energy.

Answer 6

If dark potential is Einstein's cosmological consistent (and on the instant each and every thing seems to point at that identity) then it does not get diluted via improve. while be counted and radiation the place much less diluted than on the instant, they ruled the improve which for this reason replaced into slowing down. issues replaced while DE began to be the main significant element. i do no longer understand the contradiction you look to locate with the upward thrust of entropy.

Answer 7

Assuming then, a linear relationship with time, does that mean that everything is going to get faster relative to now? Can light get faster?

Answer 8

What so-called 'dark energy' may be isn't known. Period.