http://www.bbc.co.uk/news/science-environment-13462926

I was reading in an astronomy book that atoms absorb photon's to create Fraunhofer lines in the visible portion of the solar spectrum.

Could this possibly mean that what science thinks of as being dark matter is really atoms that have yet absorbed a light photon?

Could the beginning of our Universe come about as a result of a large mass of dark matter located in a concentrated portion of the Universe that absorbed light photon's that when the atoms absorbed the light photon's the increase in energy would have caused an instant acceleration of the atoms within the dark matter.

We know that heat or an increase in the velocity of atoms creates faster moving atoms that can transform a solid into a liquid and then into a gas.

So it could have been possible that a large mass of inert atoms occupied an area of space and absorbed light photon's. When the atoms absorbed the light photon's the mass expanded at a significant rate of velocity that caused other atoms to release their energy as well causing an energetic reaction chain of events that formed the Big Bang explosion.

Dark matter isn't matter which is painted black -- it's hidden, nonbaryonic matter that doesn't interact strongly with itself, normal matter or light. It is transparent or very-very nearly so to all of these.