what is dark matter in the universe?

Question

how would its existence explain the accelerating expansion of the universe? is there really dark matter out there, or do we just not yet fully understand the physics of space and time? the apparent existence of dark matter could just be an error in einstein's equations right? thank you for your answers ahead of time and have a great day!!!!!!!!!!!!!!

Answer 1

We don't precisely know what the dark matter is. Some of it is simply matter that is not luminous enough to be seen, but there is likely to be other mass that is in forms of matter we don't yet fully understand. Although we don't have a complete handle on space and time, I think that most theoreticians expect that dark matter exists and that it is not simply a calculation error.

Dark energy is used to explain the acceleration of the universe.

Answer 2

Dark Matter is mass that is predicted to exist by the equations that describe the early universe (i.e. the big bang) Since it is matter, it has gravitational effects on the other matter surrounding it. Observations of the effects of this gravity confirm that there is more matter than we can see (hence the dark in dark matter.) Because clumps of typical matter would form stars, and therefore be visible, it is thought that the dark matter is not composed of the same building blocks as the atoms we are familiar with are. Another confirmation of dark matter's existence is the existence of galaxies; the gravity of the "normal" matter within many galaxies is not enough to hold the spinning mass together, so it is thought that the dark matter provides the needed attractive force. Go look at the work done by NASA's Wilkinson Microwave Anisotropy Probe for more information on Dark Matter, Dark Energy, and the early universe.

Answer 3

The Dark Side Of The Universe Carries Dark Matter (The Other Side Of Infinity).

Black Hole Is A Dark Monster Which Sucks In Light, And Leave's Behind The Dark Matter, Dark Matter Is A Black Hole. Or Dark Matter Is Just, Darkness.

Answer 4

Dark matter is the term for the hypothesized matter in the universe required to explain the missing mass problem of the standard cosmological / big bang model. Dark matter supposedly interacts with normal matter by gravity, but does not absorb or emit radiation, and thus cannot be seen. Big bang cosmologists propose that about 25% of the universe is made up of dark matter (possibly consisting of non-standard particles, such as neutrinos, axions or weakly interacting massive particles [WIMPs]).1 70% of the universe in their models is made up of the even more obscure dark energy, leaving 5% of the universe as ordinary matter.

http://www.creationontheweb.com/content/view/4625/