text: Touring Saturn's Moon, Enceladus Saturn's moon, Enceladus, was discovered two hundred and fifteen years ago today, but the Cassini probe has targeted this icy world for its lunar tour through the Saturnian system.    Astrobiology Magazine -- Two hundred and fifteen years ago today, Sir William Herschel discovered Saturn's moon Enceladus (499 kilometers, 310 miles across)...