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class27a - Monday Nov 3 Syllabus class notes and homeworks...

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Monday, Nov. 3 Syllabus, class notes, and homeworks are at: www.as.utexas.edu courses AST 301, Lacy Reading for this week: chapter 12 The Wednesday help session is in GRG 424 at 5:00 (for the entire semester).
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Topics for this week Describe the Milky Way Galaxy Describe the Standard Candle method of determining distances and how Cepheid variable stars are used as standard candles. Describe how astronomers measure the distribution of mass in the Milky Way and what they find. Explain why we might expect the spiral arms in the Milky Way to become more tightly wrapped and how density wave theory solves this problem. Describe the various types of galaxies, both normal and active, and how they differ from the Milky Way
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The Milky Way A hazy band of light across the sky Latin: Via Lactea, or Road of Milk Astronomy: Galaxy Galileo saw that it was made of many stars. The stars form a band across the sky because they are in a flat distribution, like people in this room.
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