October 11, 2007 9:19 AM PDT
NASA's Cassini spacecraft continues its journey around Saturn and its moons, stretching the imagination of scientists who are analyzing new photos taken from orbit around the ringed planet.
From Cassini's recent journey to the moon Iapetus (shown here), scientists uncovered a strange "runaway" process, in which vaporized water ice is moving from the dark areas to the white areas of the moon. But they don't yet know where that dark stuff originated.
In a separate photo gallery, check out images and the latest findings about Jupiter and its moons. Plus, you can view our special report celebrating 50 years of space exploration here.
Photo by NASA/JPL/Space Science Institute
