astro-qs5.pdf - Question Set#5(ASTR/Coleman NAME(The first...

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Question Set #5 (ASTR/Coleman) NAME________________________________ (The first 10 questions are 7 points each. The rest are 6 points each). See sections 10-4 to 10-12 in Chapter 10 of your textbook. Answer these questions: 1. Most stars on an H-R diagram are found in one part of the diagram. It is an area on the diagram where all stars are plotted for 90% of their lifespans. What part of the diagram is that? 2. What is a category of star systems where you can figure out how heavy the stars are (their masses)? 3. If two stars are orbiting each other, what is the name for the point in space that they both go around? 4 . What two measurements are plotted on a “light curve”? (these go on the vertical and horizontal axes) 5. Sometimes astronomers see something on the sky that looks like one star. They spread the light of the star out into a spectrum. Then they see there is evidence in spectral lines that there are actually two stars present. This kind of binary star is called what?
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