Those who propose an old universe assert there is a [[starlight problem]] for the [[young earth creationism|young universe]] model. Two key assumptions for the objection to a young universe model is that the speed of light has been constant and [[methodological naturalism]]. | Those who propose an old universe assert there is a [[starlight problem]] for the [[young earth creationism|young universe]] model. Two key assumptions for the objection to a young universe model is that the speed of light has been constant and [[methodological naturalism]]. |