... Tonight's Sky . ... Astronomy for Kids . ... Life less likely on Enceladus . A new model based on data from Cassini suggests water isn't necessary for geyser-like activity to occur on Saturn's icy moon. ... Orbiting Saturn since June 30, 2004, the Cassini spacecraft has revealed a south polar region of Enceladus with an elaborate arrangement of fractures and ridges, intense heat radiation and geyser-like plumes consisting of ice crystals and gases such as methane, nitrogen and carbon dioxide. ...