The sun is losing mass(1.5cm per year) by emitting radiation and the orbits of the planets are widening because of the weakening gravity of the sun.
Are most of the stars shedding mass via radiation also decreasing the total mass of the universe contribute to the increasing redshift of the universe?
Aside from the loss in mass/gravity. How much force is coming from the radiation pushing on itself from inside the universe?
Where does all that lost mass from radiation go from the universe?