The Great Space Race_ Hubble_s Tension _ the Expanding Universe _ sleep documentary

🌌 "The universe is expanding. But how fast is a question that has split physics in two."In this calm, 2-hour sleep documentary, we explore the Hubble Tension—one of the greatest mysteries in modern cosmology. Scientists measure the expansion rate in two ways: using the cosmic microwave background (the afterglow of the Big Bang) and using Cepheid variable stars in distant galaxies.These two methods give different results. The difference might seem small, but it means our understanding of dark energy, gravity, or the early universe could be wrong.We trace the history of the "Great Space Race," from Edwin Hubble's first observations to the James Webb Space Telescope's latest attempts to resolve the conflict. Told with a slow, steady voice and no sudden sounds, this is the story of a universe that refuses to obey our predictions—and the quiet wonder of a mystery that keeps astronomers awake at night. Press play and let the expanding cosmos carry you into deep sleep.