class21 - AST 309 The Solar System MWF 12-1 John Lacy RLM...

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AST 309 The Solar System MWF 12-1 John Lacy RLM 16.332 471-1469 lacy@astro.as.utexas.edu Class web page: www.as.utexas.edu -> courses -> AST 309 -> class web page user: AST, pwd: 309 Marty Bitner RLM 16.312, MW 10-11 471-8275 mbitner@astro.as.utexas.edu Steve Young RLM 9.312, Th 3-5 fineline@gmail.com
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Reading for after spring break • Ch. 8, Mars • Assignment for Wednesday 3/19: Describe with one sentence for each the three most important ideas in the chapter, and tell me something that confused you or you want to know more about.
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Formation of the Solar System
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Lecture Outline • Early ideas about how planets form • Process of star formation • Evidence for disks around young stars • Ideas related to how planets form • Work at UT on protoplanetary disks
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“Solar Nebula” Hypothesis 1775: Immanuel Kant proposed that the Solar System and Sun formed in the same gaseous cloud. 1796: Pierre-Simon Laplace specifically predicted that as this cloud contracted, rings were ejected leading to the planetary sequence.
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“Solar Nebula” Hypothesis While not correct in detail, does provide a natural
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class21 - AST 309 The Solar System MWF 12-1 John Lacy RLM...

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