Titan 26 October 2012.

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Presentation transcript:

Titan 26 October 2012

Titan [2003] Second-largest moon in SS Density ~1900 kg/m3 thick atmosphere! Sublimation N2 (90%), methane, ethane ethane may condense clouds, rain,oceans/lakes/ponds/erosion??? Geology unknown due to thick atmosphere Voyager 1981

Titan [2005] Thick Atmosphere N2 (90%), methane, ethane methane clouds, rain, lakes Geology Erosion!!!!!!!!!! Volcanism, Tectonics A few impact craters

Huygens Landing Site Rounded cobbles resemble Mars

Titan’s Lakes Of methane mostly (& ethane) Few 100m deep Red areas are those that changed between images a year apart Blue appeared 2004-5

False Color - Radar Reflectivity solid vs. liquid False Color - Radar Reflectivity

Cassini Radar images Lakes- high latitudes Braided channels – floods? 440 km impact crater Minerva Linear dunes near equator

Geology • Cryovolcanism • Impact cratering • Dune field formation 440 km diameter 25 km Impact Crater Cryovolcanic Extrusion ? Dune Field Geology • Cryovolcanism • Impact cratering • Dune field formation

Upper haze layers Photochemical smog Temps ~80-90K = -300 F Atmospheric pressure at surface ~1.5 bars

interaction with the atmosphere Surface Chemistry and interaction with the atmosphere Ices + Liquids + Aerosol Precipitates

Titan has a "hydrological cycle" like Earth but with methane instead of water! SMOG Methane rain

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