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Unformatted text preview: Review 4 Chapters 22: The Milky way How do we know that there is gas and dust in interstellar space? How were the size and shape of the Milky Way discovered? What is the shape, form, structure, and various parts of the Milky Way? Where is our sun located in the Milky Way? Why do astronomers think that much of the Milky Way consists of dark matter? Why does the galaxy have spiral arms? Is there a massive black hole at the center of the galaxy? What is an HII region and how does it evolve? What is the origin of the 21 cm line and how do we utilize it in astronomy? What are the various types of nebulae in the Milky Way? Chapter 23: What are the different kinds of galaxies? How have astronomers determined the distances to galaxies? What makes astronomers think that galaxies contain vast amounts of dark matter? How do we think What makes astronomers think that galaxies contain vast amounts of dark matter?...
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- Summer '08