answersLogoWhite

0


Best Answer

The two are quite unrelated. It would be harder to find similarities than differences.

More exactly, the two are only related by the fact that (as of 2013) we don't understand either -- thus the name "dark."

Dark matter is the type of matter that exists throughout our Universe, which interacts with baryonic matter (ie, the stuff we understand) only through gravity. This stuff (whatever it happens to be) warps space and prevents galaxies from flying apart as they spin; but does not interact via the electromagnetic force, the strong force, or the weak force. Its mass density in our Universe, as best we can tell, is about six times greater than that of bayronic matter.

Dark energy is whatever is causing the space within our Universe to increase the rate of expansion. Gravity SHOULD be slowing down that expansion over billions of years, but SOMETHING is causing the rate to go higher. What is causing this? -- we have no idea!!

User Avatar

Wiki User

11y ago
This answer is:
User Avatar
More answers
User Avatar

Wiki User

11y ago

I just read an article from Hubble site on the theoretical idea of dark energy, it implies that due to the dimming of light emitted contrasts of supernovae from different time periods such as 1 2 3 4 5 billion years apart they theorized that the invisible must be pulling apart the mass of universe because the dimming from these supernovae are not the same and they should be.

Well here is what i think, if anyone believes that the invisible, dark matter, space what ever you want to call it, is responsible for expansion of universe, you are nuts. First of all, nothing gives you nothing. If one is to believe that dark space is energy then the nuclear age is a myth and all scientific formula need thrashing or perhaps there must be alternate ways of starting universes. What!

If one is to accept the idea of dark energy then one must forget the laws of physics such as the laws of conservation and thermodynamics.

Maybe if the nothing exists and it is energy then it would explain all the ghost stories I have heard.

****

The previous paragraphs demonstrate a profound lack of understanding of the nature of science.

The space within our Universe IS expanding. This is as much a fact about our Universe as gravity. Don't like this fact? Too bad -- you'll just have to move to a different universe, because it IS occurring here, no matter what you may think of it.

The laws of General Relativity show that matter within our Universe should slow down this expansion. The only question is HOW MUCH is the mass in our Universe slowing it down. Ever since Hubble Expansion was first discovered over eighty years ago, we've noted that the rate of expansion seems to be constant over many billion years, so the amount of mass in our Universe (more precisely, the DENSITY of mass in our Universe) is very close to almost no slow-down over time. Again, don't like this fact? - then you'll have to leave this universe.

> if anyone believes that the invisible, dark matter, space

> what ever you want to call it, is responsible for expansion of universe, you are nuts.

Dark matter and dark energy are completely separate entities. One of them (dark matter, since it is gravitational) would cause the expansion of our Universe to slow down. It's dark ENERGY that's causing the expansion rate to speed up.

In the 1990s, we FINALLY developed a "standard candle" (look it up) to precisely measure the rate of expansion of very distant galaxies -- ie, ones that were part of expansion many billion years ago. With this, it was hoped that we could FINALLY see how much the mass in our Universe was slowing down the expansion of the Universe.

What we found was that the rate of Hubble Expansion has NOT been decreasing over time -- it has been INCREASING.

What's causing the rate of Hubble Expansion to increase over time? WE HAVE NO IDEA!! Some form of energy, about which we have no clue, is causing the rate of expansion of the space in our Universe to go faster over time.

We call it DARK energy precisely because don't understand it.

> If one is to accept the idea of dark energy then one must forget the laws of physics

This, at least, is correct. To understand dark energy -- whatever it happens to be -- we WILL have to forget the laws of physics AS WE NOW UNDERSTAND THEM. Believe it or not, our understanding of our Universe -- what we call the "laws" of physics -- CHANGES as we acquire new information. 100 years ago, we didn't even know galaxies existed, let alone that we were at the periphery of one, let alone that the space between our galaxy and others was expanding, let alone that the rate of this expansion was increasing over time. Each of these concepts -- and hundreds of others -- were uncovered due to well-done experiments, and forced us to re-write the "laws" with which we use to deal with the Universe we find ourselves in.

> First of all, nothing gives you nothing

Actually, we now know, as an absolute fact, that empty space, even if completely devoid of matter, is teeming with energy. And it does so with no violation of conservation of energy whatsoever. Don't like this fact? I think you know the answer.

This answer is:
User Avatar

User Avatar

Wiki User

12y ago

Dark matter is a name given to matter from which we see its gravitational influence (through astronomical observations) but we do not see the matter itself. It is therefore called dark matter as opposed to light matter such as stars. We do not know what dark matter itself is; it may consists of particles or objects we have no knowledge of today.

The Higgs boson is a particle predicted by theories of particle physics, but it is not a dark matter candidate (i.e. not a particle that can reasonably explain the large amount of dark matter we see).

Dark matter candidates are for example heavier particles (arising from for example supersymmetry), primordial black holes and even heavy neutrinos.

This answer is:
User Avatar

User Avatar

Wiki User

12y ago

Dark Energy is a strong repelling force that drives all matter not held strong enough gravitationally to each other apart. Dark Matter is a form of matter that only interacts with other matter gravitationally, and hence is invisible and undetectable other than its force to keep galaxies together.

This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What is the difference between dark matter and dark energy?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Continue Learning about Natural Sciences

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.


What is the opposite of Dark Energy?

There is no opposite of dark energy in the sense that there exists something that is the exact opposite of dark energy. Dark energy speeds the rate of expansion of space, even empty space, and gravity, mass, or matter causes the opposite in that it causes a decrease in the rate of expansion of space in areas that have matter.


Why is dark matter important to study?

Dark matter is a different type of matter not like we have on Earth; we can prove matter is here on Earth it's called baryonic matter. Dark matter is different it does not emit or reflect electromagnetic radiation which makes it harder for astronomers to find it. Dark matter is observed by the gravitational effect that it has on radiation and the visible universe. The gravitational force it has from dark matter plays a critical role in the shape of the galaxies orbit and the because of the hot gases in the groups of galaxies. Dark matter also has an effect on visible light caused by the groups of galaxies that is more known as gravitational lensing. This unknown matter is called dark matter, because we do not know what these undiscovered matter particles are. In time we will know and discover these particles and will soon be properly understood. Dark matter and dark energy are different but do have some of the same features. Dark energy is different from dark matter because dark energy is making more room in the galaxies which is making more room; so now since there is so much more room because of the dark energy it is moving all the galaxies around us drift away from us. Astronomers thought that the rate of the universe expanding would soon be slowing to a stop; more recent measurements showed that the rate of the universe expanding is actually going at a faster rate of speed. The relationship between dark matter and dark energy is that both make up about 96% of the matter in the known universe. They are not the same dark energy is what is creating the expansion of the universe, and dark matter is what holds the universe's galaxies and other objects in place. Although they do share some features, dark matter or dark energy cannot be observed or measured by any of the tools or techniques that we have currently today. They both serve as place holders for basic principles of the universe. Answer2: Dark Energy an Dark Matter are the result of defining enerrgy as a scalar quantity. Dark Energy is a vector quantity. This is explained with Newton's Gravity Energy. Newton's Energy is W = -mGM/r the is a scalar energy, a potential energy. Newton's Law is as if the mass m is not moving. The mass m is moving and tthus creates momentum, a vector. it als creates cmV=cP vector energy, the so-called Dark Energy. This the total Energy is W = -mGm/r + cP = -vp + cP This is a Quaternion Energy consisting of a scalat part and a vector part, cP. This Dark Enegy cP is larger than the -vP by the ratio of c, the speed of light and v the velocity. This Dark Energy is also the source of the Dark Matter, cP. The universe consists of Quaternion quantites, at the scale of the univers and the atom. The Gravitational and Quantum Energy is W = -vh/2pi r + cP = -vp + cP = [-vp,cP] The Energy is Conserved at 0 =XW= [d/dr,Del][=vh/2pi r,cP] when v=c. indicating that the Univers is stationary due to Dark Energy. 0 = [vp/r -cp/r, -1R cp/r + 1R vp/r].


How are dark matter and dark energy similar?

No, at present dark matter can't be used as energy. However, when Marco Polo went to China he observed the them burning black rocks (coal) for heat. This was an unknown and unexpected source of energy in Europe at the time. Undiscovered sources of energy are by definition presently unknown.


What is the difference between the light dependent and the dark reactions of the Calvin cycle?

What is the difference between the light dependent and the dark reactions of the calvin cycle?

Related questions

What is the difference between dark energy and dark matter and what are the inferred affects of each?

From my studies dark energy creates electrical phtons making a stonger pull to the source than dark matter does. In fact, I think that dark energy can power a car, but sadly it is impossible to harness dark energy. I'll have to do little more research to be sure.


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.


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


Can Astronomer's directly detect dark energy and dark matter?

Dark matter and dark energy have NOT been detected yet, so any ideas about detecting dark energy and dark matter, whether it be directly or indirectly, is speculation for now.


Is there more energy in dark milk or white chocolate and by how much difference?

There is no large or distinct difference between the two.


Why dark energy and matter does not obey standard physics and chemistry?

Standard physics and chemistry are based on the energy and matter that we know. We do not know much about dark energy or dark matter, but only that it may exist.


Compare the amount of visible matter in the universe with the total amount of matter and energy?

4% Visible Matter (Atoms) 23% Dark Matter 73% Dark Energy


What is dark energy matter?

haga


What is space that has no matter?

Dark energy.


Do scientist think that dark matter and dark energy exist?

Yes, they do.


What is a negative space?

Negative space is dark energy and dark matter.


What form of energy does earth not have?

Dark Matter