33:29Cosmic Microwave Background Radiation
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Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/science/cosmology-and-astronomy/universe-scale-topic/big-bang-expansion-topic/v/cosmic-background-radiation Cosmic Microwave Background Radiation (Relic Radiation)
Published 2010-11-18 · Watch on YouTube ↗
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