Dark Matter

In view of the compelling evidence that most of the matter in the universe is dark matter, one of the most pressing questions in modern astrophysics is: What is dark matter?

There is as yet no answer to this question, but it is becoming increasingly clear what it is not. Detailed observations of the cosmic microwave background with the WMAP satellite show that the dark matter cannot be in the form of normal, baryonic matter, that is, protons and neutrons that compose stars, planets, and interstellar matter. That rules out hot gas, cold gas, brown dwarfs, red dwarfs, white dwarfs, neutron stars and black holes.

Many different lines of evidence suggest that the mass of dark matter in galaxies, clusters of galaxies, and the universe as a whole is about 5 or 6 times greater than the mass of ordinary baryonic matter such as the protons and neutrons.

The conclusion: there is not enough mass in the stars and gas to provide the necessary gravity. Elliptical galaxies must contain about five times as much mass in dark matter as the amount present in stars and gas. It is no exaggeration to say that solving the dark matter problem will require a profound change in our understanding of the universe.
http://chandra.harvard.edu/xray_astro/dark_matter/index2.html

I know what it is.

Colossians 1:16-17

16 For by Him all things were created, both in the heavens and on earth, visible and invisible, whether thrones or dominions or rulers or authorities--all things have been created through Him and for Him.

17 He is before all things, and in Him all things hold together.