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1 | | Sketch an H-R diagram of the evolutionary path of the Sun. |
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2 | | Sketch an H-R diagram of the evolutionary path of a 15Msun star. |
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3 | | Describe how a protostar is believed to form. |
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4 | | What heats a protostar? |
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5 | | What is a bipolar flow? |
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6 | | How can we observe protostars? Why are they surrounded by dust and gas? |
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7 | | What is a T Tauri star? |
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8 | | What is a Bok globule? |
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9 | | What determines when a star becomes a main-sequence star? |
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10 | | What determines how long a star stays on the main sequence? |
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11 | | What makes a star move off the main sequence? |
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12 | | Where do main-sequence stars end up as they evolve? |
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13 | | Why do high- and low-mass stars evolve differently as they become red giants? |
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14 | | Why is it easier for a high-mass star than for a low-mass star to burn helium? |
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15 | | What is meant by a pulsating star? |
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16 | | Why do stars pulsate? |
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17 | | What happens to a solar-mass star when it starts to burn helium in its core? What does it turn into? |
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18 | | What is a planetary nebula? |
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19 | | What is one explanation for how a low-mass star expels its outer layers to make a planetary nebula? |
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20 | | What is left when a planetary nebula dissipates? |
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21 | | What makes a high-mass star’s core collapse? |
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22 | | How do the neutrons form in a massive star’s remnant core? What other kind of particle is made along with the neutrons? |
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23 | | What is a supernova explosion? |
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24 | | What kind of subatomic particles have been observed when a supernova explodes? |
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