Saturn Surprises Spur Extension of Cassini Mission

摘要

Saturn's rings and moons turned out wilder than any scientist could have imagined, but unknowns remain as the Cassini spacecraft concludes its primary mission and embarks on a new one."One of the greatest surprises about Cassini's science results is that some of the most extreme predictions have turned out to be correct," said Bob Pappalardo, a geologist at NASA's Jet Propulsion Laboratory in Pasadena, Calif., who recently signed on as Cassini project scientist.