astro-qs6.pdf - Question Set#6(ASTR/Coleman NAME(Each...

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Question Set #6 (ASTR/Coleman) NAME________________________________ (Each question is worth 5 points each) . See sections 11-12 to 11-15 in Chapter 11 of your textbook. 1. What happens to Cepheid variable stars when they brighten and fade repeatedly? Possible Choices: They gradually turn inside out. They expand and shrink. They burn types of fuel they did not burn before. They precess more strongly (wobbling). 2. How fast do the most luminous (brightest) Cepheid stars pulsate compared to the dimmer ones? (A) More quickly with short periods (B) More slowly with long periods 3. What is the name for tear-drop shaped regions around a pair of binary stars that indicate which areas are controlled by the gravity of each star? See sections 12-1 to 12-10. Answer these questions: 4. When a star like our Sun finally dies, its core will shrivel up to become a tiny “white dwarf,” while the outer layers of the star will eject into space, producing a nebula. What is the name for this type of nebula. Do not simply mention an example of one. 5. The Chandrasekhar Limit is a limit on the maximum mass that a certain kind of dead star is allowed to have. What is this type of dead star?
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