How is the universe changing and is valid or reliable?

The universe is constantly changing through processes such as cosmic expansion, the formation and destruction of stars, and the evolution of galaxies. Observational evidence, including the redshift of distant galaxies and cosmic microwave background radiation, supports the validity of these changes. The reliability of our understanding is reinforced by repeated observations and theoretical models, though ongoing research continues to refine our knowledge of these processes. Overall, our comprehension of the universe's changes is grounded in scientific inquiry and empirical evidence.