The steady state theory was proposed in 1948 opposes the idea that the density of the universe never changes it states that there is no beginning to the blank. It has always existed. It was disapproved because the amount of blank cannot be explained by the blank.

The steady state theory was proposed in 1948 and it opposes the idea that the density of the universe never changes. Instead, it states that there is no beginning to the universe; it has always existed. However, it was disproved because the amount of observed matter and energy in the universe cannot be explained by the steady state theory.