Final Review Study Guide

Final Review Study Guide - surface temperature that allow...

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How do we Search for Planets around Other Stars? -- ‘Extra-solar’ planets, I.e. around stars other than our own sun, are too faint and small for us to image directly (for the most part). -- Instead, we have to look for the effects that a planet has on its star, using indirect techniques, such as: 1. Doppler spectral shifts (measuring red/blue shift) produced by “wobble” of star 2. Astrometry (measuring the exact position of a star as it wobbles) 3. Photometry (Measuring the change in brightness of a star due to interfering planets) 4. Pulsar timing (planet shifts pulsar timing) habitable zones: Region where large terrestrial planets could have
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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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Final Review Study Guide - surface temperature that allow...

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