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Unformatted text preview: Albedo:-Percentage of sunlight that reflects off a surface-Tells about surface of worlds-Doesn’t say anything about interior of worlds-Can tell the properties of o Clouds, Snow, Rocks, and Landforms Moment of Inertia [K]:-Tells about how mass is distributed in interior of worlds o More mass concentrated in core = Lower moment of inertia o Usually 0.3 < X < 0.4 o Undifferentiated worlds, K = 0.4 Almost never greater than 0.4 (mass concentrated on outside) Astronomical Unit (AU):-Relative distance to sun-Earth and Sun = 1 AU Kepler’s Laws: 1) Planets follow elliptical orbits Earth goes around in a near perfect circle (a circle is a special type of ellipse) 2) A planet goes different speed at different points in its orbit Fastest when closest to star (perigee) Slowest when furthest away (apogee) 3) Planets closest to Sun move more quickly around the Sun Mercury moves faster than Earth...
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- Spring '08
- Solar System, Planet, planetary body Density