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Lecture 25: A Tale of Two Galaxies, The Milky Way and Andromeda
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Lecture 26: Spiral Galaxies
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Lecture 27: Spirals, Ellipticals, a Irregular (Oh My!)
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Lecture 28: Groups a Clusters of Galaxies
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Lecture 29: When Galaxies Collide
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Lecture 30: Active Galaxies a Quasars
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Lecture 31: A Tale of Two World Views: Special Relativity
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Lecture 32: Space, Time, a Gravity: General Relativity
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Lecture 33: Einstein's Universe
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Lecture 34: The Expanding Universe
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