21 | Lecture 25: A Tale of Two Galaxies, The Milky Way and Andromeda 2006-02-09 |
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22 | Lecture 26: Spiral Galaxies 2006-02-10 |
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23 | Lecture 27: Spirals, Ellipticals, & Irregular (Oh My!) 2006-02-13 |
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24 | Lecture 28: Groups & Clusters of Galaxies 2006-02-14 |
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25 | Lecture 29: When Galaxies Collide 2006-02-15 |
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26 | Lecture 30: Active Galaxies & Quasars 2006-02-16 |
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27 | Lecture 31: A Tale of Two World Views: Special Relativity 2006-02-20 |
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28 | Lecture 32: Space, Time, & Gravity: General Relativity 2006-02-21 |
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29 | Lecture 33: Einstein's Universe 2006-02-22 |
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30 | Lecture 34: The Expanding Universe 2006-02-23 |
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