class29a - Friday, Nov. 7 Syllabus, class notes, and...

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Friday, Nov. 7 Syllabus, class notes, and homeworks are at: www.as.utexas.edu courses AST 301, Lacy Reading for next week: chapter 13.1, 13.2, 15 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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Spiral arms The brightest stars, and most young stars, in spiral galaxies are arranged in a spiral pattern in their disks. Could the stars in spiral arms be moving along the arms toward the centers of their galaxies? Or could stars stay where they are in spiral arms as a spiral
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This note was uploaded on 07/13/2010 for the course AST 301 taught by Professor Harvey during the Fall '07 term at University of Texas at Austin.

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class29a - Friday, Nov. 7 Syllabus, class notes, and...

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