Tuesday, December 16, 2008
In other news, Cassini scientists believe that Titan may have active cryovolcanoes spewing a mix of water ammonia and methane. (I took a punt on depicting one of these in The Quiet War, so I'm biased towards hoping it's true.) So in addition to two moons with subsurface oceans (Europa and Enceladus), and two moons with icy geysers (Enceladus and Triton), there may be at least two moons with active volcanoes. What next?