What is dark matter?

Answer 1

These are several websites that should help with
the subject of Dark Matter!
http://www.math.ucr.edu/home/baez/physics/
ParticleAndNuclear/particle_zoo.html

http://www.math.ucr.edu/home/baez/physics/Relativity/GR/dark_matter.html

http://www.space.com/scienceastronomy/astronomy/dark_matter_sidebar_010105.html

Answer 2

Dark matter is some unknown substance which makes up maybe 26% of the energy density of the universe. It produces and reflects no light or radiation but can be detected by graviational pull. Worse yet, dark energy is out there and 70% of the universe is dark energy.
Only 4 % of the energy density is visible to us.

Answer 3

In astrophysics and cosmology, dark matter is matter of unknown composition that does not emit or reflect enough electromagnetic radiation to be observed directly, but whose presence can be inferred from gravitational effects on visible matter.

In other words, we can see the effects of it, but not directly observe it, as of yet.

Its sort of like a galactic fudge factor.

Answer 4

If there was a big bang and if our understanding of everything that followed is correct then dark matter is the stuff scientists use to plug up the holes with.

Answer 5

This is what happens when physicists sit around making up equations with at least one variable which was simply inserted because it was "needed," and altering them until they *seem* to mean something...all without benefit of any observational or experimental evidence. That's where you get things like "manifestations of non zero cosmological constant" and other erudite and insupportable claims.

Dark matter is what they "needed" to make incorrect equations and assumptions work. It is what they *needed* to close the Universe. It is what they *needed* to make names for themselves, get degrees or get published, or appear on some PBS documentary.

It is invisible, utterly inert, undetectable non-stuff that is not composed of any kind of matter we have ever verified, but it does seem to have gravity. Well, how convenient, for those who want to justify erroneous hypotheses! In other words, it doesn't exist. Well, that's my admittedly unqualified opinion.

Answer 6

dark matter is matter of unknown composition that does not emit or reflect enough electromagnetic radiation to be observed directly, but whose presence can be inferred from gravitational effects on visible matter.

Answer 7

It is matter that has succumbed to the lure of the Dark Side. See Star Wars. lol

Answer 8

It is manifestation of non-zero cosmological constant

Answer 9

You probably left some of it behind this morning..:)