titan 21 october 2011. titan [2003] second-largest moon in ss density ~1900 kg/m 3 thick atmosphere!...
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![Page 1: Titan 21 October 2011. Titan [2003] Second-largest moon in SS Density ~1900 kg/m 3 thick atmosphere! Sublimation N 2 (90%), methane, ethane ethane may](https://reader035.vdocument.in/reader035/viewer/2022062313/56649d395503460f94a13e02/html5/thumbnails/1.jpg)
Titan
21 October 2011
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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
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Titan [2005]
• Thick Atmosphere
• N2 (90%), methane, ethane
• methane clouds, rain, lakes
• Geology • Erosion!!!!!!!!!!• Volcanism, Tectonics
• A few impact craters
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Huygens
Landing Site
Rounded cobblesresemble Mars
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Titan’s LakesOf methane mostly(& ethane)
Few 100m deep
Red areas are those that changed between images a year apart
Blue appeared 2004-5
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solid vs. liquidFalse Color - Radar Reflectivity
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Cassini Radar images
Lakes- high latitudes
440 km impact crater Minerva
Braided channels – floods?
Linear dunes near equator
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Geology
25 km
440 km diameter
Impact Crater
Dune Field
Cryovolcanic Extrusion ?
• Cryovolcanism • Impact cratering• Dune field formation
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Atmospheric pressure at surface ~1.5 bars
Upper haze layersPhotochemical smog
Temps ~80-90K= -300 F
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Surface Surface Chemistry andChemistry andinteraction with interaction with the atmospherethe atmosphere
Ices + Liquids + Ices + Liquids + Aerosol Aerosol PrecipitatesPrecipitates
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Methane rain
Titan has a "hydrological cycle" like Earth but with methane instead of water!