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Titan 26 October 2012
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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 [2003] Second-largest moon in SS Density ~1900 kg/m3](http://slideplayer.com/slide/14432735/90/images/3/Titan+%5B2003%5D+Second-largest+moon+in+SS+Density+%7E1900+kg%2Fm3.jpg "thick atmosphere! Sublimation. N2 (90%), methane, ethane. ethane may condense. clouds, rain,oceans/lakes/ponds/erosion Geology unknown due to thick atmosphere. Voyager")
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Titan [2005] Thick Atmosphere N2 (90%), methane, ethane
methane clouds, rain, lakes Geology Erosion!!!!!!!!!! Volcanism, Tectonics A few impact craters
![Titan [2005] Thick Atmosphere N2 (90%), methane, ethane](http://slideplayer.com/slide/14432735/90/images/7/Titan+%5B2005%5D+Thick+Atmosphere+N2+%2890%25%29%2C+methane%2C+ethane.jpg "methane clouds, rain, lakes. Geology. Erosion!!!!!!!!!! Volcanism, Tectonics. A few impact craters.")
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Huygens Landing Site Rounded cobbles resemble Mars
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Titan’s Lakes Of methane mostly (& ethane) Few 100m deep Red areas are those that changed between images a year apart Blue appeared
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False Color - Radar Reflectivity
solid vs. liquid False Color - Radar Reflectivity
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Cassini Radar images Lakes- high latitudes Braided channels – floods? 440 km impact crater Minerva Linear dunes near equator
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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
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Upper haze layers Photochemical smog Temps ~80-90K = F Atmospheric pressure at surface ~1.5 bars
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interaction with the atmosphere
Surface Chemistry and interaction with the atmosphere Ices + Liquids + Aerosol Precipitates
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Titan has a "hydrological cycle" like Earth but with methane instead of water!
SMOG Methane rain
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