The Evidence for Modern Physics: How We Know What We Know Season 1 Episode 21 How We Know the Universe Is Accelerating

  • May 21, 2021
  • 30 min

Investigate evidence that the expansion of the universe reversed its gradual slow-down and stepped on the accelerator 5 billion years ago. "Dark energy" is the term given to this mysterious force that is expanding space at an ever-increasing rate. Learn how this remarkable phenomenon was discovered and explore its link to the cosmological constant proposed by Einstein a century ago.

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The Evidence for Modern Physics: How We Know What We Know, Season 1 Episode 21, is available to watch and stream on The Great Courses Signature Collection. You can also buy, rent The Evidence for Modern Physics: How We Know What We Know on demand at Apple TV Channels, Prime Video, Amazon online.
  • First Aired
    May 21, 2021
  • Runtime
    30 min
  • Language
    English
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