ESA's Cassini-Huygens website features news, status reports on the mission, images, videos, live streaming and much more! The Huygens mission is the ESA-provided element of the international Cassini-Huygens mission to Saturn and Titan jointly developed by NASA and ESA. The primary scope of the mission is to descend through the atmosphere of Titan, Saturn's largest moon, making measurements and collecting information about its atmopshere and surface which resemble that of a very young Earth.