•Largest moon of
Saturn
•Has thick
atmosphere
–Pressure ~ 1 earth atmosphere
–Mostly N2,
some CH4
–Gas held because of low
T
•UV acting on CH4 Þ smog
–Ethane produced –
Lakes?
–Can “see”
surface only in IR
•Cassini dropped a probe
in early 2005.
•“Code of the Lifemaker” by James P. Hogan, good sf