Exam3_review - Planets in/near HZ 4 Exam 3 Review - 4 How...

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Exam 3 Review Stephen Eikenberry 02 December 2010 AST 2037 1
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2 Exam #3 Review 1 Life on Venus/Mercury Planet properties (esp. atmospheres, temps) Venus + Greenhouse Effects Life in the Giant Planets Planet Properties Moon properties Europa Enceladus Titan Etc.
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3 Exam #3 Review 2 Habitable Zones Definition (liquid water expected) Causes (star power received → luminosity, distance) HZ characteristics versus star type Extrasolar planet searches Radial velocity (basics of technique, what can it tell us) Mass (incl. inclination uncertainty) Eccentricity; velocity amplitude Orbital Period Transits (basics of technique, what can it tell us)
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Exam 3 Review - 3 Extrasolar planet populations What kinds of planets and orbits are there? Hot Jupiters Giant planets Eccentricity Tidal locking What effects from the searches create biases in the observed populations? Giant planets versus low-mass planets Close-in versus far-out orbits Eccentricity Kinds of planet systems
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Unformatted text preview: Planets in/near HZ 4 Exam 3 Review - 4 How Common Is Life Eccentricity why is it bad for life? Factors affecting the rarity of life Number of stars in Galaxy What fraction have planets What fraction of those planets are suitable for life What fraction of suitable planets produce life? How do we know/estimate the above factors 5 Exam 3 Review - 5 The Drake Equation N civ = N * f P n e f l f i f t L civ / L gal What do these factors mean? How do we know/estimate their values? What are the arguments for estimating: f l ; f i ; f t ; L civ ? 6 Exam 3 Review - 6 Extraterrestrial intelligence Communications between civilizations Methods Limits (light speed) Travel between civilizations Velocity and time dilation Rockets and fuels Best-case rockets (100% efficient, anti-matter powered) Other options (incl. wormholes) SETI UFOs 7...
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Exam3_review - Planets in/near HZ 4 Exam 3 Review - 4 How...

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