class11a - AST 309S The Solar System MWF 11-12 John Lacy R...

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AST 309S The Solar System MWF 11-12 John Lacy RLM 16.332, M-F 12-12:30 471-1469 lacy@astro.as.utexas.edu Amanda Bayless Daniel Kagan RLM 16.312, Th 10-12 RLM 16.322A, W 3-5 471-3462 232-3923 baylessa@astro.as.utexas.edu kagan@astro.as.utexas.edu class website: www.as.utexas.edu courses AST 309S username: AST password: 309
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Reading for this week Chapter 4: Surface changes We’ll have the quiz on Wednesday. I hope we’ll have the test graded by Friday.
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Topics from chapter 4 How can planetary surfaces be modified? impact cratering – especially on Mercury and Moon lava flows – especially on Venus and Earth weathering – especially on Earth and Mars formation of craters dating surfaces from crater counts effects of wind and water resurfacing by extensive lava flows evidence of water on Mars
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Energy of an impact Energy of motion is the easiest energy to understand: a fast moving object has more energy then a slow one. E = ½ m v 2 Heat energy is random energy of motion of atoms: for each atom, kT =
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class11a - AST 309S The Solar System MWF 11-12 John Lacy R...

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