what percentage of the universe is thought to be dark energy?

Question

Assuming the general theory of relativity is correct, what is the total mass energy percentage of "dark energy" in the universe? what about "dark matter"?

Answer 1

Here's the basic, short answer:

Physicists believe only about 5 percent of the universe consists of the ordinary matter that we are made of and that we can see. About 70 percent of the universe is thought to consist of dark energy, the mysterious force that seems to be accelerating the expansion of the universe. And about 25 percent of the universe is dark matter, a form of matter that hasn't yet been detected directly.

Answer 2

Dark Energy Percentage

Answer 3

I actually just watched a thing on TV about this. They said that all the mass of all the Galaxies is about 3% of the Universe. They assumed that dark matter made up the other 97%, however after conducting experiments, they found out that only 22% of the Universe contained Dark Matter, so doing further research they concluded that the last 75% of the Universe is Dark Energy. Dark Energy also explained why the Galaxies are actually moving faster away from each other, as opposed to slowing down, so this is what made them assume that Dark Energy accounted for the missing 75%.

Answer 4

The exact nature of this dark energy is a matter of speculation. It is known to be very homogeneous, not very dense and is not known to interact through any of the fundamental forces other than gravity. Since it is not very dense—roughly 10−29 grams per cubic centimeter—it is hard to imagine experiments to detect it in the laboratory (but see the references for a claimed detection). Dark energy can only have such a profound impact on the universe, making up 70% of all energy, because it uniformly fills otherwise empty space. The two leading models are quintessence and the cosmological constant.

Answer 5

They all have a different idea, which is why it is such a huge theory. Not one of them agree with one another on how much of the universe is dark energy. The theory is very flawed, since they don't know to begin with..

I love how everyone is referencing Wiki or the History Channel when no person knows the percentage of dark energy/matter/etc in the universe. It's all guesswork.

Interesting question; I'm surprised it got pages of replies.

Answer 6

The existence of dark energy, in whatever form, is needed to reconcile the measured geometry of space with the total amount of matter in the universe. Measurements of the cosmic microwave background (CMB), most recently by the WMAP satellite, indicate that the universe is very close to flat. For the shape of the universe to be flat, the mass/energy density of the Universe must be equal to a certain critical density. The total amount of matter in the Universe (including baryons and dark matter), as measured by the CMB, accounts for only about 30% of the critical density. This implies the existence of an additional form of energy to account for the remaining 70%.[6]

The theory of large scale structure, which governs the formation of structure in the universe (stars, quasars, galaxies and galaxy clusters), also suggests that the density of matter in the universe is only 30% of the critical density.

The most recent WMAP observations are consistent with a Universe made up of 74% dark energy, 22% dark matter, and 4% ordinary matter.

Answer 7

As far as numbers are concerned, the scientists have not derived at any of them about dark matter and they have just confirmed the existence of dark matter as they cannot be seen. It was observed recently when 2 galaxies crossed each other and real or visible matter collided but the dark matter passed thru unihibited. The theories say that the dark matter must consist of most of the universe and the things visible are very meagre indeed. Scientists are indeed trying to arrive at numbers but the whole universe is indeed not observable which a major hitch in proceeding with the same.

Answer 8

Dark matter makes up about 25% of the Universe and dark energy makes up about 70%. Normal matter takes up only about 4% of the Universe.

Answer 9

This is only concepted. The true reading of what is the size
of area in itself is measurable only if we admit to a substar
size. Measuring in itself is visionation of the highest order. A
human life compared to trees in heights and mass, what if
the average tree is 30 inches tall as some mathematics does
suggest. We are aware of the order of philums. Sooo this
what my point gets after, bugs. Is there a correlary universe
where the proficiency of the bug realized as forms of human
life, ie. space robots comics. This surely exists. Now this
actually adds to a reduction of mass displacement in terms
of energy due to the passing of time, now we need to include
all time stages. That makes a reduction of 30% of energy
in the unknown value, basically competitive past region sites.
I think the theory in this question is good, and I will answer for
each galaxy there is 25,000 spatial areas between, around and
passing by per one galaxy. About 15% is still unknown tho
shaped towards black hole, plasmas, lightenings, and energy.

Answer 10

The Universe is made up of 74% dark energy, 22% dark matter, and 4% ordinary matter.

Answer 11

Actually, it depends on who is doing the "thinking". In terms of the beliefs of the majority of cosmologists, the answers from cruellife666 and Brite Tiger are pretty accurate. However, as a very good friend once put it, "Isn't it an irony that we are prepared to believe that the Universe is composed of 4% matter that we know, 22% Dark matter that we know nothing about, and remainder Dark energy that is just an empirical possibility"

All this, just to defend our belief that Newtons laws on gravity are indeed Universal. All the calculations on Dark matter and dark Energy are based on the fundamental premise that the Newton's laws of gravitation hold good universally. Already, exceptions to the law have been made for the very Small constituents of atoms. Isn't it also an analogical possibility that the Very Large also need an exception to the rule?
So, what we are defending as Dark matter and dark energy, might just be anomalies or exceptions to Newton's laws, considering that Newton did not Invent Gravity: he merely grouped together his observations and hypothesised them as a theory that holds good in case of most Matter