Can “tired light theory” explain the observed redshifts of galaxies?
I am an adult male who doesnt know much about astronomy, but would like to learn more. Recently I heard that scientists have discovered evidence that expansion of the universe is speeding up and that this is a very surprising finding. But is it possible that this is not surprising at all. I read about a year ago of an old theory that the red shift that is used to justify the idea that the galaxies are moving away from each other has another possible explanation that is even older, known as the tired light theory. Doesnt this new finding support this old theory, and if not why not? There are many problems with the tired light theory, the main one being that there is no known way for photon’s to lose energy (without also changing in other observable ways) that is not equivalent to the universe expanding and the photons expanding with it. The main argument against conventional cosmology (in which the universe is homogeneously expanding) and for tired light theory seems to be that if the u
