The eccentricity of Saturn's orbit around the sun may be responsible for the unusually uneven distribution of methane and ethane lakes over the northern and southern polar regions of the planet's largest moon, Titan according to researchers at the California Institute of Technology. On Earth, similar "astronomical forcing" of climate drives ice-age cycles. 
OK done with my science report, was bored with Tiger, Obama, Health care, and the Salahi couple...
Another find..who knew!!!
Terzan 5! Cosmic Fossil Discovered Embedded In Milky Way