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What is the ratio of dark matter to ordinary matter in a universe?
Wiki User
∙ 14y ago
We're not certain that "dark matter" even exists, or what the proportions of "normal" to "dark" matter is. I have read some articles saying that the ratio might be as much as 20-1; 20 parts dark matter to one part normal matter, but these are predicated (I believe) solely on rough calculations based on the perceived mass of the galaxy and its apparent rotational speed.
There appears to be a great deal of speculation and estimation in these calculations.
One important trait of a scientist is to NOT GUESS about things that we don't know, and to admit the boundary between the known, the believed, and the unknown. Even if the current hypotheses about dark matter and dark energy turn out to have some basis in reality, we will certainly be surprised by the truth when we finally learn it.
Wiki User
∙ 14y ago
Wiki User
∙ 13y ago4% normal matter
23% dark matter
73% dark energy
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Which is thought to be more prevalent in the universe dark matter or dark energy?
Dark energy. The current estimates for the distribution of mass/energy in the Universe are approximately: 68% dark energy 27% dark matter 5% baryonic (i.e. "normal") matter
Why do astronomers theorize that there is dark energy in the universe?
There are several pieces of evidence for dark matter. For example: * Our galaxy, and many other galaxies, rotate way too fast for the amount of known matter. * Evidence from gravitational lensing.
What's the dark matter in the universe?
Dark matter is matter of an unknown type. It is known to exist, due to its gravitational influence, but it is not known what it is made of. There is at least 5 times as much dark matter than "normal" matter.
When was Dark Universe - film - created?
Dark Universe - film - was created in 1993.
What is dark matter state?
So far we aren't sure. In general, dark matter is a form of matter we cannot directly observe; its existence can only be inferred through gravitational interaction with baryonic "light" matter. Basically, Dark matter is stuff we can not see or detect but we think must be there. Because we can not see it capture it or even detect it, we do not know what is or consists of. However, we know enough about the universe to know that dark matter must consist of the same fine matter that atoms are made of. Dark Matter is the name scientists give to the "stuff" that we believe must be part of the known universe. Scientists can however observe and measure the affects of dark matter. Hear is how it works: We know that all objects made of matter generate gravity, like the sun the earth and the moon. Even a single person generates a small amount of gravity. The amount of gravity a planet or star produces is directly related to its mass, which is another way of saying or how much matter it is made of. The amount of gravity an object produces causes a very predictable orbit and speed. Sir Isac Newton gave us the exact mathematical formula for calculating how much mass an object in space has by measuring is orbit and speed. Here is the discovery: When scientists look through telescopes at distant galaxies as well as looking at our own galaxy they now have the ability to mostly add up the stars planets dust and the stuff we call normal matter. We should then be able to return to our telescopes and measure normal speeds at which the galaxies are spinning. What scientists discovered is that all the galaxies are spinning much much faster than expected. And they are not flying apart. Something is generating the extra gravity that is holding the galaxies together. For now because we we cannot see it, and light does not reflect off it, nor can we catch it or touch it, we call it DARK MATTER! Scientists believe it is mixed in with our own galaxy, and it makes up 95% of the known matter in the universe. Black Holes are another example of this type of thinking. We can not see or observe black holes because light can not escape them. One of the only reasons we know that they are there is because large stars spin around very powerful centers of enormous gravity only to be sucked in never to escape. We can not see black holes, but we can identify that a very large amount of mass is there by its affects on other objects. Dark matter helps explain the large-scale structures of the Universe such as superclusters and voids and why they exist. Dark matter is necessary for many mathematical equations to balance. If there is no such thing as dark matter, then many scientific theories do not make sense. Some scientists believe that dark matter exists everywhere, though it is not visible it is coexisting in dimensions all around us that we can not experience. In these discussions, there is a narrow line between Science and Belief. Answer2. "Dark Matter" is a missing actor in a Gravitational Play. Maybe we are observing an Electromagnetic Play, an Homopolar Motor! Maybe, nature uses Electromagnetism not Gravity to control the galactic stars motions. The energy E=mcV is the solution for the "Missing Matter " problem,. mcV is the energy providing the speed of stars in the galaxy.. The velocity is V = E/mc. This derives from the Electric Model of the galaxy, a homopolar Motor, , where the galaxy rotates as current comes in on the edge and Jets out of the center. Charged stars rotating create a B magnetic field perpendicular to the galaxy. In effect there is a mass spectrometer for stars. The equation is the Lorentz force F=qVxB = mv2/r giving velocity v= qrB/m = qruI/rm =quI/m=qzI/mc=E/mc! The velocity is independent of the radius r and dependent on the current I and the ratio q/m of the stars. The vector energy E=mcV is the "Dark Matter" of the Missing Matter in the galaxies and the "Dark Energy" of Gravitational Theory.
Most of the visible universe if made of?
The universe is around 70% dark energy (a.k.a. empty space). The rest is mostly dark matter, with a few percent for ordinary matter. That is the current scientific model.
What force do scientists such as Saul Perlmutter believe is counteracting gravity and allowing the universe to accelerate the rate of its expansion?
Dark energy is the term to refer to the force that is causing an expansion of the universe to accelerate. It is estimated that the universe is 68.3 percent dark energy, 26.8 percent dark matter, and 4.9 percent ordinary matter.
Is dark matter Solid liquid or gas?
We do not know as we have not found any dark matter to examine. The only way we detect it and know it exists is due to its gravitational attraction of the ordinary matter we can see. One speculation when neutrinos were discovered to have tiny nonzero masses was that dark matter might be neutrinos. Another speculation is that dark matter is only ordinary matter, but its in another separate universe in a shared higher dimensional spacetime. Nobody knows.
Where is the largest dark matter in the universe?
Dark matter is everywhere, there really is no place that has the most dark matter.
The amount of dark matter in the universe important?
Yes it is important because on basis of dark matter amount our universe will expand.
Is the universe matter?
The Universe contains matter, energy, dark matter, dark energy, empty space - and of course, lots of structures made up of those.The Universe contains matter, energy, dark matter, dark energy, empty space - and of course, lots of structures made up of those.The Universe contains matter, energy, dark matter, dark energy, empty space - and of course, lots of structures made up of those.The Universe contains matter, energy, dark matter, dark energy, empty space - and of course, lots of structures made up of those.
Is there a lot of dark matter in the universe?
Depends what you mean by "a lot." The gravitational effect of dark matter -- whatever the stuff happens to be -- is about six times greater than that of all the visible matter in our Universe.
What is the ultimate matter in the universe?
Black or dark matter
What is the percentage of dark matter in your universe?
In my Universe, about 23% of its energy is found in dark matter -- about four to five times more than in matter we happen to understand. I don't know the percentage in your Universe.
What is the percentage of dark matter in the universe?
In my Universe, about 23% of its energy is found in dark matter -- about four to five times more than in matter we happen to understand. I don't know the percentage in your Universe.
Is dark energy and dark matter killing the universe?
No. What is killing the Universe is the Second Law of Thermodynamics.
What subsystems make up the universe?
It is theorized that dark matter makes up 80 percent of the universe. Another theory is that 68 percent of the universe is dark energy, 27 percent is dark matter, and 5 percent is baryonic matter.
