Does anyone know what Dark matter and dark energy actully is?
539508
The content of the Universe is widely thought to consist of three types of substance: normal matter, dark matter and dark energy.\n \nNormal matter consists of the atoms that make up stars, planets, human beings and every other visible object in the Universe. As humbling as it sounds, normal matter almost certainly accounts for the smallest proportion of the Universe, somewhere between 1% and 10%.  \n \nThe more astronomers observed the Universe, the more matter they needed to find to explain it all. This matter could not be made of normal atoms, however, otherwise there would be more stars and galaxies to be seen. Instead, they coined the term ‘dark matter’ for this peculiar substance precisely because it escapes our detection. \nAt the same time, physicists trying to further the understanding of the forces of nature were starting to believe that new and exotic particles of matter must be abundant in the Universe. \n \n \nThese would hardly ever interact with normal matter and many now believe that these particles are the dark matter. At the present time, even though many experiments are underway to detect dark matter particles, none have been successful. Nevertheless, astronomers still believe that somewhere between 30% and 99% of the Universe may consist of dark matter.\n \n \nDark energy is the latest addition to the contents of the Universe. Originally, Albert Einstein introduced the idea of an all-pervading ‘cosmic energy’; before he knew that the Universe is expanding. The expanding Universe did not need a ‘cosmological constant’ as Einstein had called his energy. \n\nHowever, in the 1990s observations of exploding stars in the distant Universe suggested that the Universe was not just expanding but accelerating as well. The only way to explain this was to reintroduce Einstein’s cosmic energy in a slightly altered form, called ‘dark energy’. No one knows what the dark energy might be. \n\nIn the currently popular ‘concordance model’ of the Universe, 70% of the cosmos is thought to be dark energy, 25% dark matter and 5% normal matter.
486232
The universe is theorized to contain dark energy and dark matter. There have been some confirmation of it's existence but really just speculation at this point. The idea of dark matter had been identified by Einstein but it wasn't till the discovery that the universe is accelerating it's expansion and contains up to 70% more matter that the idea of dark matter and energy became serious areas of study. If you mean a vacuum to mean absence of air it is a vacuum but within that "vacuum" there definitely is matter.
943536
Currently, dark energy seems to be a "fifth" force that seems to conteract gravity at large distances.\n\nHowever, there could be many more forces that we don't know about. For example, what if every dominant force we know is result of a strong force overpowering a weaker force?\n\nIn the case of "dark energy" and gravity, gravity is just a small fraction stronger than dark energy. So it takes a lot of mass to have a reasonable gravitational field. But like the strong and weak nuclear forces, gravity is only stronger than "dark energy" at relatively short distances. As the distances increase, dark energy overpowers gravity and pushes objects away from each other.\n\nIt's something to think about. Counteracting forces, especially if one of them is dominanting, would be difficult to discern.\n\nBut that's just one example. There could be many others that we just haven't experienced yet. These may be all there are. Scientists are making new discoveries everyday so only time will tell.\n\n~X~
113546
Dont listen to miligfgdf... ohh that name has no sence for god sake wat does it mean.\nWell there are to types of dark energy scientifical or religional. I know a bit of it, dark magic is sometimes known as the makings of the deamons or the gods shadow.(note it doesnt mean that god is evil just his shadow preduced this evil magic) i for info am a meterome, i can control the dark magic a bit but i work with good magic more if u need any mor advice send an e-mail to tigi_the_shamn@yahoo.com.\nSo evil(dark) magic is sometimes a power that brakes your spirit shield, that is produced by your own soul(if anyone thinks it is nonsence then your wrong you science freaks i know more then you as i talk to the spirit world and get the info i need) SOmetimes it called Auraa but i can make my spirit sheild stronger then your meteromes trew the centruies do this called "Gods Sheild" by the way wich i do when in crysis. Magic is not something we can always control in this world, sometimes it gets away but normal humans cant even hold it , i can but i had 2 expiriences with dark creatures i had one in my power but it broke frew my sheild it might seem nothing but it really hurts when your spirit sheild is broken especially for meteromes.\nWell thats all for coclusion dark energy is something we can control sometimes and it came from the day when god appeard, it sometimes breaks your spirit sheild and can take your life away.
241767
In cosmology, dark matter refers to hypothetical matter particles, of unknown composition, that do not emit or reflect enough electromagnetic radiation to be detected directly, but whose presence can be inferred from gravitational effects on visible matter such as stars and galaxies. The dark matter hypothesis aims to explain several anomalous astronomical observations, such as anomalies in the rotational speed of galaxies (the galaxy rotation problem). Estimates of the amount of matter present in galaxies, based on gravitational effects, consistently suggest that there is far more matter than is directly observable. The existence of dark matter would also resolve a number of inconsistencies in the Big Bang theory, and is crucial for structure formation.
1154361
Hi Decisiveliu\n\nThe most recent observations indicate the following:\n\n* about 70% of the energy density of the universe is dark energy (for physicists this is an omega value of 0.7, where omega is the ratio of the actual density to the critical flatness density)\n* about 30% (omega = 0.3) of the energy density is normal mass-energy\n\n* of this 30%, about 27% is dark matter, and the remaining 3% is baryonic or luminous matter\n\n* about 20% of the total dark matter mass is likely to be massive neutrinos (small weakly interacting particles), about 10% large non-luminous objects (eg black holes, neutron stars, brown drawfs, etc) and the remainder unsure as yet\n\n* of the visible matter the vast majority is hydrogen (as suggested above), followed by helium, and then (relative) traces of other elements.\n\n\nHope this helps!\nThe Chicken
1041009
WIMPS are "Weakly Interacting Massive Particles", which are hypothetical particles that have been invoked to solve the "dark matter" problem.  (Astronomical observations of things like the rotational speed of galaxies, and the interactions of galaxies in clusters can be explained if there is some form of matter, called "dark matter", that does not absorb or emit electromagnetic radiation, and thus cannot be detected by normal astronomical observations).\n\nWIMPS would only interact with other particles (and each other) via the weak and gravitational forces.  They would therefore be very hard to detect.  Because no one has yet detected them, and there are are not predicted by the "standard model" of particle physics, they remain simply an interesting conjecture.\n\nWIMPS are supposed to have large masses, and clumps of them could act as "gravitational nuclei" for the formation of galaxies in the early universe.  I do not know of any other connection between WIMPS and the inflationary scenario for the early universe.\n\nThe bubble theory of the universe is a variant on the currently favored inflationary theory for the early universe.  In this theory, instead of a single point expanding at a single time to form a single universe (ours) that constitutes all of physical reality, different portions of physical reality "decay" to form independent universes at differing times.  Physical reality would therefore correspond to a "foam" of independent universes, each of which is completely isolated from one another.\n\nI've never heard of the "hyperdimensional theory of the universe".
66808
Energy is created.\nPhysicists currently believe that about 75% of the energy in the universe exists in a form known as dark energy.\nThis energy has a constant density over all space regardless of what the space contains and so the total amount of dark energy increases as at the same rate as the increase of the volume of the universe (which is expanding).
1153702
Dark energy comprises 70% of the universe and dark matter comprises 26% of the universe. Ordinary baryonic matter, in the form of gas and stars, only makes up 4%.\n\nDark matter refers to matter particles, of unknown composition, that do not emit or reflect enough electromagnetic radiation to be detected directly, but whose presence may be inferred from gravitational effects on visible matter such as stars and galaxies. Dark matter is explained as being cold, non-baryonic, collision-less dust.\n\nDark energy is a hypothetical form of energy which permeates all of space and has strong negative pressure. According to the theory of relativity, the effect of such a negative pressure is qualitatively similar to a force acting in opposition to gravity at large scales. In other words, dark energy acts as a repulsive force or anti-gravitation and is responsible for the acceleration of the universe.
426392
"dark matter" is an object or objects that we can not see with visible light, but can detect by gravitational effects and radiation.\n\n"normal matter" (a term i've never heard before, but if im assuming right) would be everything we can detect with visible light.\n\nBecuase there is so much out there that we can't actually see with our eyes, it makes sense for there to be much more "dark matter"
101972
Dark matter is just stuff that doesn't give off any radiation. We see stars in space because they're glowing. Planets are considered dark matter because they're just lumps of rocks in space. Far away planets are almost impossible to see even with the strongest telescopes because they don't give off any light. We see them only when they cross in front of a star.\n\nGalaxies revolve around each other for the same reason why planets revolve around the sun, gravity. The gravity of a  galaxy is just on a larger scale, but it's the same principle.
706023
All it means is that we don't know everything. We've learned quite a bit in the short time since we developed written language and the scientific method, and the rate of learning is accelerating. We'll learn more in the next 10 years than we've learned in the last 100. We'll probably understand the nature of dark matter in the next 10-20 years, and I would bet long odds that it won't require any supernatural explanation.
720068
First off the Universe is not a sphere that would assume that there is internal area. Most theorists think that space is an infinite sheet, but if it was a shperoid it is similar to a baloon. The baloon is three dimensions and the skin is two the skin would be our universe.\n\nThat being said dark mass and energy occupe 95% or so percent of the mass in the uniform. We have no idea what dark energy or dark mass actually is we only think it is there because our theories dtermine there is a lot more stuff in the universe then we have been able to measure
69147
So far science doesn't know what so-called dark matter is. Dark matter is the name for some exotic type of mass that is required to explain the motions of large structures in space, like galaxies, clusters of galaxies, etc.,. At this time, we think that dark matter accounts for about 23% of the universe's mass, while regular matter can only account for about 4%. The remaining 73% is thought to be what's called 'dark energy,' the totally unknown feature that is causing the universe's expansion rate to speed up.
246692
It's hard to speculate about that...But from all the books I've read on that subject none of them mention that. They do mention that dark matter exists, but that's about it.
1150780
In fact, there is a great deal of evidence showing it is not. What little we know of the dark matter and energy is that they are not composed of baryons. But anti-protons *are* bosons. There are some candidates for the dark matter (axions are a good bet) but anti-matter in the usual sense is ruled out by observation.
590743
The most interesting fact I know?  That they don't exist and that they're some stupid idea somebody came up with to help explain a few things we don't currently understand.  Singularities have infinitely dense mass?  Riiiight.\n\nYou'd better start reading up on the Electric Universe, buddy.  There are powerful magnetic fields all over the Universe, and the stupid idiot "scientists" running the show right now don't like to acknowledge that maybe there are electric currents shaping our galaxies.