Turil,
I think physics has issues in dealing with infinities that it will have to overcome. The concept of entropy only applies to a closed, ie. finite set. In an infinite state, energy being lost/radiated away from one system, is replaced by other energy radiating away from neighboring systems.
Currently Big Bang theory argues the entire universe is expanding and eventually those distant galaxies will be so far away their light will no longer reach us. Now that means more units defined by the speed of light will be required to cross this space. Presumably then it is being denominated in lightyears, which means the expanded space is the numerator. That's not expanding space, but an increasing distance in stable space, as measured by C.
So we have this void filled with cycles of radiation expanding and mass contracting. According to theory, this balances out to overall flat space and this is explained by inflation blowing the universe up so far that it only appears flat, but what if it really is flat? When we see light that has traveled billions of years, it has had to thread its way between all those gravity wells of galaxies. Not only that, but it's redshifted proportional to distance. Since I don't see how they can really use relativity to say space itself expands, when the speed of light doesn't increase proportionally to maintain C, so there really is only increased distance, then we would appear to be at the center of the universe. Now we do happen to be at the center of our view of the universe, so an optical effect would explain this quite well. So then the light in a basically gravity free environment expands, much as that in a gravity zone contracts. Think of space as the rubber sheet over water. Then when the ball pushes it down, the water pushes the rest back up proportionally, so that the overall effect is 'flat' and we only see light that travels the 'high ground.'
Now that is a whole other argument, which I get drawn into quite easily and have argued in the contests and blogs here quite often, but am trying to be more sociological in this contest.
Regards,
John M