The life cycle of a star depends on its size, and the life cycles of stars apply to the Big Bang theory because of how the stars were born. Stars are born from giant clouds of gases. The gases are made up of atoms that came from the subatomic particles that were caused by the universe cooling after the Big Bang. This provides evidence of an evolving universe, because the first elements are the results of nuclear fusion at the cores of the first stars.
Birth of a star.