Homework Handout 9 - HW9 Due Thursday April 24 If words are required in an answer then the answer should be expressed in a complete sentence If a number

Homework Handout 9 - HW9 Due Thursday April 24 If words are...

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HW9: Due Thursday April 24 If words are required in an answer, then the answer should be expressed in a complete sentence. If a number is required in an answer, then the number should have the correct number of significant figures, and should include units. If you are asked a multiple choice question, you are required to indicate all correct answers (and there may be more than one). Remember to show all work, and be legible and clear. Your homework should be returned on a separate piece of paper. 1. Where does most star formation occur in the Milky Way today? A) in the halo B) in the bulge C) in the spiral arms D) in the Galactic center E) uniformly throughout the Galaxy 2. Observations of the center of our galaxy provide critical information regarding the structure of entire Milky Way. a) What constellation lies in the direction toward the galactic center? b) What time of year is the galactic center highest in our sky? ( Hint: Use Appendix I ) c) What is Sgr A*? d) What evidence suggests that it contains a massive black hole? 3. Spiral galaxies, like our own Milky Way, have standard features, as well as unique properties. a) Draw simple sketches of our galaxy as it would appear face-on and edge-on. In both sketches, identify the disk, bulge, halo, spiral arms, and the Sun’s location. Also indicate the galaxy’s approximate dimensions.
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