... Saturns Moon Dione from Cassini . ... The clouds are caused by cold air moving over a warm water and result in bands of lake-effect snow. ... The Cassini spacecraft now orbiting Saturn passed near the frozen moon at the end of October, capturing the most detailed images since the Voyager spacecrafts in the early 1980s. Doomed Star Eta Carinae . ... Where are Titan's craters? ... When the robot spacecraft Cassini swooped past Saturn's moon Titan last month, however, radar images showed few craters. ...