" these new discoveries from titan may be the early evidence of radiation originating solely from the surface or possibly from the interior of enceladus , " asked dr . michele dougherty , director investigator for the cassini high-resolution and professor at imperial collegiate in london . investigators have suspect enceladus as ecologically active and a possible source of apollo ' s colder e star . enceladus is the most sensitive object in the orion system , absorb about 90 percent of the sunlight that hits it .
Titan is the fifteenth of Saturn's known satellites.