Understanding the Universe: An Introduction to Astronomy, 2nd Edition Season 1 Episode 70 The Dark Side of Matter

October 19, 2023
31 min

Until a few decades ago, astronomers thought that galaxies were composed primarily of stars. There is now strong evidence that most of the mass of galaxies may be invisible dark matter. Clusters of galaxies are also dominated by dark matter.

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Understanding the Universe: An Introduction to Astronomy, 2nd Edition, Season 1 Episode 70, is available to watch and stream on The Great Courses. You can also buy, rent Understanding the Universe: An Introduction to Astronomy, 2nd Edition on demand at Apple TV Channels, Prime Video, Amazon online.