ENVS 1050 Final: Extraterrestrial Impacts - Study Guide
23 Jan 2016
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More than 200 asteroids with diameters greater than 100km, ~1000 with diameters greater than 30km, and 1 million with diameters greater than 1km. Largest asteroid ceres (~950km diameter); once considered a dwarf planet. Simple craters relatively small (depth-to-diameter ratio of. Diameter at which craters become complex depends on surface gravity of the planet the greater the gravity, the smaller the diameter that will produce a complex structure (on. What is a neo; spaceguard program and its goals: neo a near earth object ; any object that comes close to earth (closer than 45million km or. Almost all are asteroids; currently 9948 are catalogued (only 94 are comets) Consists of mainly small bodies (remnants of solar system"s formation) Objects are composed largely of frozen volatiles ( ices ) methane, ammonia & water simple and complex impact craters, impact metamorphism and its comparison with normal metamorphism; o o.
