Ep 30: The Cosmic Tape Measure: Redshift, Cepheid Variables, and Supernovae. GPT explains galaxies

Understanding the vastness of the universe is no small feat. Astronomers have developed several sophisticated methods to measure cosmic distances, each serving as a critical piece of the puzzle in our understanding of the universe's scale, the behavior of celestial objects, and the dynamics of cosmic expansion. Let's dive into three of the most compelling techniques: redshift, Cepheid variables, and supernovae, and see why they're so crucial for cosmology.