This artist's rendition shows the Huygens probe at the start of its 22-day coast phase toward one of Saturn's moons, Titan, as it is jettisoned from the Cassini spacecraft. Huygens will be the first probe to land on a world in the outer Solar System. The Cassini spacecraft is due to arrive and orbit the planet Saturn on June 30, 2004. JPL/Image by Steven Hobbs/Handout
This artist's rendition released June 28, 2004 shows the Huygens probe as it reaches the surface of Saturn's moon Titan. The Cassini spacecraft (top left corner of the image) flies over with its High Gain Antenna pointed at the probe. Saturn is seen in the background through Titan's thick atmosphere of methane, ethane and mostly nitrogen. Thin methane clouds dot the horizon, and a narrow methane spring or 'methanefall' flows from the cliff at left and drifts mostly into vapor. Smooth ice features rise out of the methane/ethane lake, and crater walls can be seen far in the distance. The Cassini spacecraft is due to arrive and orbit the planet Saturn on June 30, 2004. NO SALES REUTERS/NASA (news - web sites)/JPL/Image by David Seal/Handout