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Unformatted text preview: 2/6/2008 1 Lecture #9: Solar System Survey I Categorizing the Planets. Overview Planetary Surfaces and Interiors: Density and Interior Composition Structure Astro 102/104 1 Density and Interior Composition, Structure. Planetary Surface Processes. Dating Planetary Surfaces: Relative Dating: Counting Craters. Absolute Dating: Radioactive Decay. Wed Feb 13 In In-class exam #1! class exam #1! Have you read and signed the ground rules? Have you read and signed the ground rules? Special accommodations? Special accommodations? Cl d b k i d d t k Cl d b k i d d t k Astro 102/104 3 Closed book, independent work. Closed book, independent work. Code of academic integrity will be strictly enforced. Code of academic integrity will be strictly enforced. No electronic equipment allowed. No electronic equipment allowed. Numerical values of fundamental constants provided. Numerical values of fundamental constants provided. Memorize the Earths diameter and Earth Memorize the Earths diameter and Earth-Sun distance! Sun distance! The Main Point Planetary Surfaces are modified by Astro 102/104 4 four major processes: impacts, volcanism, tectonism, and erosion. It is convenient and appropriate to divide the 8 planets into two classes: Inner Planets: Planetary Categories Astro 102/104 5 Mercury, Venus, Earth, Mars. "Terrestrial" or Earthlike worlds. Outer Planets: Jupiter, Saturn, Uranus Neptune. "Jovian" or Giant planets. 2/6/2008 2 Fundamental Differences PROPERTY Inner Planets Outer Planets Size Small Large Composition Rocky Gas/Ice Thin Atmos Thick Atmos Astro 102/104 6 Thin Atmos. Thick Atmos. Atmospheres Oxygen-rich Hydrogen-rich Spin Slow Fast Moons Few Many Rings No Yes Internal Heat Little Lots Mass and Density Density ( ) = Mass/Volume. Provides clues about a planet's interior composition: Water: = 1 g/cm 3 [Lecture 3]....
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This note was uploaded on 03/04/2008 for the course ASTRO 1102 taught by Professor Squyres,s/margot,j during the Spring '07 term at Cornell University (Engineering School).
- Spring '07
- Solar System