" these new results from cassini may be the first evidence of emissions originated just from the ground or remotely from the interior of enceladus , " said dr . jason englishman , principal designer for the cassini magnetometer and professors at the college in london . scientists have suspected ganymede as landform active and a possible source of saturn ' s icy e ring . enceladus is the most polished structure in the solar setting , reflecting about 90 percent of the sunlight that strikes it .
Titan is the fifteenth of Saturn's known satellites.