Is dark energy an opposing force to gravity?

Question

If so, then ?????????????

Answer 1

Yes, but only on a cosmic scale. That is, it's not likely that you can package it and sell it to fuel your anti-gravity machine. However, so little is known of its nature that even that's not certain. If it indeed exists, it acts as a sort of background pressure to the universe causing its expansion rate to increase with time. The collective effect of gravity from all the mass in the universe can only slow the expansion rate. So, again, yes, you can say it's effect opposes that of gravity on this scale.

Answer 2

Yes Dark energy does exist, it is very real. It is the only answer to the expansion of the universe. What else could it be. It doesn't make sense because, the gravity of our universe, by now, should have slowed the inflation down and probably even brought it to a reverse, but thats not happening, why? The only answer is a mysterious force that works against gravity, astronomers call it Dark Energy. When Edwin Hubble first looked through his telescope, he did not expect the universe to be expanding. In fact, most astronomers were very confident in the thought that the universe was actually decelerating to a stop. But what they found out was exactly the opposite, not only was the universe expanding, it was accelerating in its expansion. Galaxies are zipping apart from each other faster than the speed of light. This should not be happening, a new force has to go into the equation, and that is dark Energy.

Answer 3

No,

Dark energy is the force that is causing the universe to expand at an increasing rate. The most likely candiated is zero point energy which is caused by quantum effects. Gravity is one of the four basic forces of nature along with weak,string and electromagnetic, all have different effects - gravity always attracts.

Answer 4

Are you talking about dark matter?
Dark matter is theoretically meant to be inside everything, and considered to be responsible for gravity.
I don't think dark matter exists. I think every single molecule creates a negeative energy so it can bond with other molecules, and when the mass of molecules gets big enough, it creates a strong field of gravity.
And just to make you all laugh, some idiot I once knew thought that if the world stopped spinning, we'd all float off into space! Ha! Think he missed the part where the Earth's rotation is a counter-balance to gravity.

But if that's not what you mean, then I don't know. Scientists talk a lot of bull. A lot. Dark energy sounds made up.

Answer 5

Not really. The simplest form of dark energy is represented by the 'cosmological constant'. This was introduced by Einstein when he didn't like the prediction that the universe was non-static. He later called it the biggest blunder of his life. None-the-less, it appears that it is required to understand the way that the universe has accelerated in its expansion. Strictly speaking, dark energy is simply an energy term in Einstein's equations that does not decrease in density as it follows the universal expansion. The consequence is that, when its density gets larger than that of matter and photons, the expansion rate increases.

BTW, Adrian D got both dark matter and dark energy wrong. Dark matter is extra matter that is needed to explain the dynamics of galaxies and various gravitational lensing events that we see.

Answer 6

This question has its basis in Newtonian physics for every action there is an equal an opposite reaction, by the way I think you mean dark matter. This is more a scientific extrapolation than a proven fact and is actually an exercise in logic. If you believe that each action has an equal and opposite reaction the logical extrapolation is that for every positive there is a negative. Therefore if you have gravity you must have anti gravity. To me though most science is an oversimplification of the world around us, we have scientific theories which are given as truth until they are super ceded by another better theory. The answer to your question as it stands is yes but you must look at the philosophy behind it, it suggests for every good thing you do there is an alter ego that does a bad thing. For every plus there is a minus. To extrapolate further for our earth there is a negative earth, our positive gravitational pull versus its negative pull on this world you exist on the negative world you exist in the form of the opposite of everything that happened to you. Theoretically correct but it is still a theory

Answer 7

Dark energy is the opposite of gravity instead of pulling galaxies like gravity it accelerates galaxies. Scientist have been puzzled by the expansion of the universe; but scientist have discovered that our universe is made up of 72% of dark energy we call it dark energy; because we don't know what it exactly is.

Answer 8

Billions of years ago, the universe was nothing but an infinitesimally small particle. Then, in less time than the blink of an eye, the universe expanded and increased in size by a factor of 1050. Expansion eventually began to slow down, allowing galaxies, star clusters, and so on, to form. Theoretically, expansion should still be slowing down; but to the contrary, expansion is in fact accelerating. Some scientists theorize that an unknown force, called Dark Energy, may be the cause of this accelerated expansion, while others disagree.

For some time, exploding stars, or supernovas, were used as a "cosmic measuring stick". That is, scientists used these supernovas to calculate the age of the universe. In 1998, two groups of astronomers surveyed supernovas in very distant galaxies. These supernovas were much dimmer than expected to be, and calculations proved that the stars were over ten billion light years away, much farther away than they should be had the universe been expanding at a slowing rate, or even a constant rate, as previously theorized. This discovery proved that the cosmos are not expanding at a slowing or a constant rate, but instead they are expanding at an accelerated rate. Since this discovery, scientists have been trying to uncover what it is that accounts for this accelerated expansion.

Scientists have calculated the density of the cosmos, and they have also calculated the total mass of all visible galaxies. However, the galaxies make up less than one-third of the density needed to satisfy the current calculations of the early universe. Simple logic tells us that there must be something else in the universe, with some kind of mass, which accounts for over two-thirds of the density of the cosmos. The new theory incorporates a different force called Dark Energy. At first, scientists did not know how Dark Energy works or what it is physically made up of. Some proposed ideas of Dark Energy are: a cosmic field associated with inflation, a low-energy field called "quintessence," and the cosmological constant, or a negative pressure, as suggested by Albert Einstein.

In July of 2003, scientists confirmed that Dark Energy exists, but they still cannot truly explain it. They do know that Dark Energy is different from every other kind of energy found. Some say it is a negative gravity, while others say that it does not necessarily act opposite to gravity, but, instead, it acts more like a negative pressure. Scientists do know for sure that Dark Energy moves space apart, causing the rate of expansion of the universe to increase. Physically, Dark Energy is invisible and of an unknown form, but accounts for 65 percent to 75 percent of the makeup of the early universe. However, scientists have no way of measuring Dark Energy with the current technology, as it affects only the universe over very large distances, as opposed to gravity which affects the universe over both large and small distances.

Einstein's Theory of Relativity allowed for the existence of a force such as Dark Energy. He spoke of a "cosmological constant" that left open the possibility that even empty space has energy. Also, according to his theory, this energy must have some kind of mass since energy equals mass multiplied by the speed of light squared, or E=mc2. While most of Einstein's theory makes sense, some say the amount of Dark Energy decreases with time, as opposed to remaining constant. It is quite possible that Dark Energy is controlling the expansion of the cosmos, so understanding the nature of Dark Energy is vital to the prediction of the fate of the universe. In order to do so, scientists must create more advanced technology to measure density, pressure, changes with time, and so on, in galaxies billions and billions of light years away.

There are also those scientists who do not believe in the theory of Dark Energy. Some physicists claim that they can explain the expansion of the universe without having to factor Dark Energy into the equations. These scientists say that gravity is, in fact, the force causing the cosmos to expand. They have added a term to Einstein's equations in his theory of relativity to support their ideas, which will not affect the early universe, but will instead affect the universe after billions of years.

Of course, there are many other theories involving and excluding Dark Energy. For example, an additional theory is that gravity slowed the expansion of the universe after the "Big Bang" until the universe was half of its current age. Then, an opposing force, Dark Energy, consumed gravity and it began pushing the galaxies away at an accelerated speed. Others say that Dark Energy conceals other dimensions that scientists have yet to find; we know of a first, second and third dimension, but where are the forth, fifth, sixth, and so on, dimensions hiding? Some even say that in order for Dark Energy to be real, space must be flat as opposed to curved..

Scientists say that Dark Energy could also be responsible for the end of our universe. Some other theories of the end include the "Big Crunch" and the "Big Chill" which deal with either an abundance of gravity or a lack of gravity. However, a new theory, called the "Big Rip," says that if dark energy continues to accelerate, it will eventually rip apart stars, solar systems, galaxies, and even atoms. This theory was created by a group of scientists from Dartmouth College, who say that the universe has twenty million years left of existence..

Answer 9

No

Answer 10

http://serendip.brynmawr.edu/biology/b103/f03/web2/mteicher.html

Read this it may tell you!