Lecture17.doc

Lecture17.doc - Mars Thin atmosphere Craters Valleys...

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Unformatted text preview: Mars Thin atmosphere Craters Valleys, Mountains Evidence for formerly flowing liquid (water?) Polar Caps 2 very small moons (Phobos, Deimos) Martian Day almost same length as Earth’s Vital Statistics Radius 3397 km = 53% of Earth Mass 6.42 x 10 23 kg = 11% of Earth Mean Density 3.94 g/cm 3 = 71% of Earth Mean Surface Temp 235 K (300 K to 150 K) Atmosphere: very thin - 1% of Earth’s surface pressure - 95.3 % Carbon Dioxide (similar to Venus) 2.7% Nitrogen, .15% Oxygen, < 0.1% Water Two very small moons (15 km, 27 km diameters) Brief History of Mars: Formed of solid rocky material like Earth, but of substantially different composition. Cooled, produced volcanism, small core. Volcanoes spewed material into atmosphere, but gravity too low to retain much. However, once probably enough water to produce evidence for liquid flows on much....
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This note was uploaded on 03/02/2011 for the course ASTRO 10 taught by Professor Norm during the Spring '06 term at Berkeley.

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Lecture17.doc - Mars Thin atmosphere Craters Valleys...

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