41 | Lecture 7: The Four Seasons 2006-09-28 |
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42 | Lecture 6: Daily and Annual Motions 2006-09-27 |
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43 | Lecture 5: Mapping Earth and Sky 2006-09-26 |
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44 | Lecture 4: Measuring the Earth 2006-09-25 |
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45 | Lecture 3: The Starry Night 2006-09-22 |
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46 | Lecture 2: Astronomical Numbers 2006-09-21 |
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47 | Welcome to Astronomy 161 2006-09-18 |
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