Homework 3

Homework 3 - H o me wor k 3 D UE Nove m be r 1 2 th 20 09 A...

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Homework 3 Astronomy 100 Dr. Warner DUE: November 12 th , 2009 Note : Unlike the last two homework assignments there are three mandatory questions on this assignment: Questions 7, 8 and 15 are required. These three questions are worth 17 points. As before, you only need to get 40 points in order to have a perfect score, and so you need to select at least another 23 points from the remaining questions. Your score will thus consist of a score out of 17 for the mandatory problems and a score out of 23 for the other problems. You may attempt, and submit more problems, but if your score for these additional problems exceeds 23, then it will be set equal to 23. Before you do this homework please read the comments on page 4 of the syllabus concerning acceptable and unacceptable levels of collaboration. 1. Summarize the evidence supporting the theory that the Cretaceous-Tertiary extinction, which includes the extinction of the dinosaurs, was precipitated to a significant degree by the impact of a meteorite. (3 points) 2. What is the Roche limit of a planet and its role in the formation of ring systems? What would happen to an astronaut who enters the Roche limit of a planet? (2 points) 3. What are the defining properties of a dwarf planet? What extra condition must be satisfied in order for a dwarf planet to be a true planet? What is the problem with the present definition of this extra condition? (4 points) 4. Describe the position, layout and typical inhabitants of the Asteroid Belt, the Kuiper Belt and the Oort Cloud. (5 points) 5. A comet often has two different tails. How are they created, of what do these tails consist and what determines their direction in space? (3 points) 6. a) The dwarf planet, Eris, has an orbit that ranges from 37.77 AU out to 97.56 AU.
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Homework 3 - H o me wor k 3 D UE Nove m be r 1 2 th 20 09 A...

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