What is dark matter?

Question

I read somewhere that it can absorb time...

Answer 1

dark matter:

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. Dark matter is believed to be part of the missing mass.

Hope that helps!

Answer 2

Absorb time? Where did you get that from?
Dark matter is still very much an abstraction, as the only property that it might has that is known is that it has gravity. No other property is known as it has not been observed directly yet.
Dark matter existence is conjectured because observing galaxies rotation indicate that they have to be significantly more massive than they would be by adding the weight of all the stars in them to behave they way they do.
That said, given that mass affects the flow of time (because of relativistic connection between time flow and acceleration) a huge concentration of dark matter would act like a black hole and accelerate objects to relativistic velocities, with the consequence of stopping the flow of time.
But saying that it absorbs time is just too much of a stretch.

Answer 3

DARK MATTER

In astrophysics and cosmology, dark matter is matter, not directly observed and of unknown composition, that does not emit or reflect enough electromagnetic radiation to be detected directly, but whose presence can be inferred from gravitational effects on visible matter. According to the Standard Model, dark matter accounts for the vast majority of mass in the observable universe. Among the observed phenomena consistent with the hypothesis 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.

Answer 4

Dark matter is something invented by cosmologists to explain something that just may not exist.
Our solar system is a satellite system which contains orbiting bodies and they vary in orbital velocity to maintain what they are.
A galaxy rotates in such a way that the outer arms are locked to the rotational speed of the center.
If it is a satellite system the outer arms would fly away,so you would need some sort of extra gravity to keep them together. Dark matter is supposed to do this.
If it is not a satellite system dark matter is an unnecessary invention. Maybe one day we will find out!

Answer 5

Dark matter, dark energy, worm holes, black holes. And people claim the religious speak baloney.

That's an awful lot of "we don't knows" that we postulate.

Sounds like Star Wars talk to me. The DARK SIDE of the force! We're the Jedi considered a religion!

Answer 6

In astrophysics and cosmology, dark matter is matter, not directly observed and of unknown composition, that does not emit or reflect enough electromagnetic radiation to be detected directly, but whose presence can be inferred from gravitational effects on visible matter. According to the Standard Model of Cosmology, dark matter accounts for the vast majority of mass in the observable universe. Among the observed phenomena consistent with the hypothesis 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 that which interacts with electromagnetic radiation: the remainder is called the "dark matter component".

The composition of dark matter is unknown, but may include new elementary particles such as WIMPs, axions, and ordinary and heavy neutrinos, as well as astronomical bodies such as dwarf stars, 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 non-baryonic 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 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 the names "dark matter" and "dark energy" serve mainly as expressions of our ignorance, much as the marking of early maps with terra incognita.

Answer 7

Dark matter is just a name for matter that does not radiate light energy. Stars are light matter while planets are dark matter.

Answer 8

tbh i have no idea.. the internet is only good 4 porn