What is Dark Matter?
Answers:
Back in the past, astronomers believed the universe to comprised only of properly developed structures. These included planets, asteriods, stars, nebulas, etc.
However, all these didn't add up to the total mass of the universe.There is still a lot of mass unaccounted for.
In the 80s, using radio telescopes, astronomers detected other material that exist in the universe. These include charged particles, mesons, sub atomic particles, etc. These material also don't emit radiation and are not detected by telescopes.
If these materiel can exist, astronomers speculate they may cover the entire universe and make up the lost mass.
The opposite of light matter i guess.
the stuff in the toilet bowl after a hard night of drinking
it is what is left behind when you go for a poo.
Poop
Ya Sou , Yonnie ..In astrophysics, dark matter is matter that does not emit or reflect enough electromagnetic radiation (such as light, X-rays and so on) to be detected directly, but whose presence may be inferred from its gravitational effects on visible matter. Among the observed phenomena consistent with the existence of dark matter are the rotational speeds of galaxies and orbital velocities of galaxies in clusters, gravitational lensing of background objects by galaxy clusters such as the Bullet cluster, and the temperature distribution of hot gas in galaxies and clusters of galaxies. Dark matter also plays a central role in structure formation and Big Bang nucleosynthesis, and has measurable effects on the anisotropy of the cosmic microwave background. All these lines of evidence suggest that galaxies, clusters of galaxies, and the universe as a whole contain far more matter than is directly observable, indicating that the remainder is dark.
its the stuff that comes out of my ***
me.
Matter that is in space but is not visible to us because it emits no radiation by which to observe it. The motion of stars around the centers of their galaxies implies that about 90% of the matter in a typical galaxy is dark. Physicists speculate that there is also dark matter between the galaxies but this is harder to verify.
pdg.web.cern.ch/pdg/cpep/gloss.
It may mean a unpleasant incident giving a negative sign
****
im not sure.....but it always happens after i eat spinach ....whats up with that
It's what comes out of the oven when my wife tries to cook.
matter that is not light
Dark matter is material that is believed to form a large part of the universe, but which has never been seen.
Dark matter doesn't reflect light, it sucks it in.
Simple question, simple answer.
nobody knows
Physical objects or particles that emit little or no detectable radiation of their own and are postulated to exist because of unexplained gravitational forces observed on other astronomical objects. It is believed to make up about 90% of the matter in the universe
It's in space, of all the matter up there, it makes up most of the matter, but is invisible to the eye.
dark matter is starship fuel. well at least it is on futurama.
In astrophysics, dark matter is matter that does not emit or reflect enough electromagnetic radiation (such as light, X-rays and so on) to be detected directly, but whose presence may be inferred from its gravitational effects on visible matter. Among the observed phenomena consistent with the existence of dark matter are the rotational speeds of galaxies and orbital velocities of galaxies in clusters, gravitational lensing of background objects by galaxy clusters such as the Bullet cluster, and the temperature distribution of hot gas in galaxies and clusters of galaxies. Dark matter also plays a central role in structure formation and Big Bang nucleosynthesis, and has measurable effects on the anisotropy of the cosmic microwave background. All these lines of evidence suggest that galaxies, clusters of galaxies, and the universe as a whole contain far more matter than is directly observable, indicating that the remainder is dark.
The composition of dark matter is unknown, but may include new elementary particles such as WIMPs and axions, ordinary and heavy neutrinos, dwarf stars and planets collectively called MACHOs, and clouds of nonluminous gas. Current evidence favors models in which the primary component of dark matter is new elementary particles, collectively called nonbaryonic dark matter.
The dark matter component has vastly more mass than the "visible" component of the universe. At present, the density of ordinary baryons and radiation in the universe is estimated to be equivalent to about one hydrogen atom per cubic metre of space. Only about 4% of the total energy density in the universe (as inferred from gravitational effects) can be seen directly. About 22% is thought to be composed of dark matter. The remaining 74% is thought to consist of dark energy, an even stranger component, distributed diffusely in space. Some hard-to-detect baryonic matter (see baryonic dark matter) makes a contribution to dark matter, but constitutes only a small portion. Determining the nature of this missing mass is one of the most important problems in modern cosmology and particle physics. It has been noted that dark matter and dark energy serve mainly as expressions of our ignorance, much as the marking of early maps with terra incognita
Dark matter is a form of energy th sucks. for example, when a star collapes, it forms dark matter from all the under-pressure. The force of pressure is equal to 728,000,000,000,000,000,000,00. nuclear bombs times quaddrillion! This is also the night sky. It covers about 93% of all space. spacehas no end.
Astronomers have calculated the mass of the universe by considering gravity, and have also worked out the total mass of all the objects they can see with their telescopes (including radio telescopes). The mass of the universe turns out to be much greater than the mass of the visible objects. So astronomers have concluded that there is a lot of "dark matter" in the universe - matter which has mass, but cannot be seen from the Earth, at least with current telescopes.
No-one is exactly sure, but the universe should contain an awful lot more "stuff" than we can see. We were always told that space is a vacuum, but this may not be quite so.
The best analogy I've heard is to think of a room as the universe. If a normal person were asked what accounts for the most mass in the room, the obvious answer is the air, even though we can't see it. However, an observational astronomer would have to answer the lights, because they are the brightest things in the room.
well i guess it could be like a segment of a "black hole"
or mabye it is like "doesn't matter"
Dark matter is hypothetical matter that we can't observe(hence the name dark)that would account for the seemingly missing matter in the universe.Until recently,however,there was virtually no evidence for it's existance.
nibbler shite as in futurama
Its what scientists use to explain the apparent lack of matter in our solar system.
Basically matter we can´t see.
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