paulgoed

I have a few questions about the validity of the big bang theory 1) does dark matter absorbed energy? 2) what would be the effect if it did and how would that be measured? 3) how would one determine the difference between a photon that is red shifted due to the expansion of space itself and a photon that has slowly lost energy into the background at a very fundamental level over very long periods of time? Are not particle energy and frequency related? 4) while I have not read anything on higher energy particles "red shifting" based upon the expansion of space, would not all particles be affected by the expansion of space (or absorption of energy into the background of space?) The reason I am asking is my wondering if there is any way to determine if photons and other energetic particles slowly loose energy to the "dark matter". And if so, would not this be manifest in a general heating of the dark matter over very long periods of time; hence accounting for some of the expansion attributed to dark energy? Maybe it is an open question - but does not the four laws of thermodynamics apply to the entire universe as a "whole?" Is there any practical method of determining the amount of energy expelled in the entire universe by the stars and other solar events over long time frames and plot the energy expelled against the assumed expansion rate of the universe?