... So it is that Saturn and Titan will be the destination of the Cassini mission, a project under joint development by NASA, the European Space Agency and the Italian Space Agency. ... This artist's rendering shows the European Space Agency's Huygens probe descending into the atmosphere of Saturn's moon Titan after being released by NASA's Cassini spacecraft. ... This artist's rendering shows the European Space Agency's Huygens probe descending into the atmosphere of Titan with Saturn in the background...