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Unformatted text preview: surface temperature that allow water to exist as a liquid-The surface temperature of the sun is about 5800 K, whereas the center is ~ 10 million K-The coronal temperatures typically reach 1-2 million degrees Kelvin Review Questions 1. What are quasars and why are they so bright? 2. What are the 3 main components of spiral galaxies? Which ones contain young stars? 3. What is the solar wind? 4. What techniques are used to detect extrasolar planets? Describe them. 5. Why is the Hydrogen gas near young, massive stars ionized? 6. What is a habitable zone?...
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- Spring '10