" these new results from cassini shall be the first evidence of gases originating either from the surface or possibly from the core of enceladus , " said dr . daniel dougherty , principal author for the cassini detector and professor at imperial collegiate in london . scientific have believed enceladus as geologically unstable and a possible source of saturn ' s icy e rings . enceladus is the most reflective objects in the solar system , reflecting about 90 kilometers of the sunshine that kills it .
Titan is the fifteenth of Saturn's known satellites.