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1 | | What does the Milky Way look like in the night sky? |
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2 | | How do we know our galaxy is a flat disk? |
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3 | | Draw a sketch of the Milky Way galaxy and label its major components. Where is the Sun in the Milky Way? |
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4 | | Roughly how big in diameter is our galaxy, and how much mass does it contain? |
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5 | | How did Shapley deduce the Milky Way’s size and the Sun’s position in it? |
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6 | | What are some differences between Pop I and Pop II stars? |
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7 | | How do we know interstellar matter exists? |
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8 | | How do we know that some interstellar matter is dust? |
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9 | | What is the difference between an emission and a reflection nebula? |
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10 | | What are the small, reddish blobs along the spiral arms of the galaxy in figure 15.7? |
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11 | | How does interstellar dust affect our observations of stars and the Milky Way? |
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12 | | What is the zone of avoidance? |
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13 | | What evidence makes astronomers believe the Milky Way has spiral arms? |
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14 | | What are some ways that we know cold clouds of gas exist in space? |
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15 | | How can we determine the Milky Way’s diameter? |
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16 | | How can we determine the Milky Way’s mass? |
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17 | | What is meant by dark matter? Why do astronomers conclude the Milky Way may contain such as yet unobserved material? |
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18 | | What kinds of astronomical objects may lie at the center of the Milky Way? |
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19 | | What is the evidence for a black hole at the center of the Milky Way? |
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20 | | Describe one model for the origin of the Milky Way. How does this model explain the difference between Pop I and Pop II stars? |
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21 | | What is meant by Pop III stars? |
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