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Lecture notes for Sept. 20th

Lecture notes for Sept. 20th - size object Sidereal...

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Lecture notes for Sept. 20th Monday, October 03, 2011 5:45 PM Mercury Sidereal period = 59 Earth days Orbital period = 88 Earth days Solar day = 176 Earth days Surface Geology cratered, Moon-like Impact craters and lava seas Global B-field = 0.01 Earth's iron core Practically no atmosphere, a few trace gases from Solar wind Day Temp = over 600 degrees Fahrenheit Night Temp = under –270 degrees Fahrenheit Venus Fact Sheet Retrograde rotation: why? Collision with moon
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Unformatted text preview: size object? Sidereal rotational period = -243 Earth days Orbital period = 225 Earth days Solar day = 117 Earth days Understanding Venus Carbon Dioxide emitted by Volcanoes? Venus hotter, so no liquid water oceans, water molecules broken up by sunlight, H lost, where is O? ???? carbon dioxide can’t dissolve in oceans Runaway greenhouse make surface hotter than Mercury!...
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