wooferhound writes: "On June 30, the Saturn Cassini spacecraft completed its four-year prime mission and begins its two-year extended mission which was approved in April to address new questions and bring it closer to two of its most intriguing targets. Among other things, Cassini revealed the Earth-like world of Saturn's moon Titan and showed the potential habitability of another moon, Enceladus. These two worlds are primary targets in the two-year extended mission, dubbed the Cassini Equinox Mission. This time period also will allow for observing the unique ring geometry of the Saturn equinox in August of 2009 when sunlight will pass directly through the plane of the rings. http://www.nasa.gov/mission_pages/cassini/media/cassini-20080627.html"