NASA's Cassini Spacecraft Closest to Saturn's Moon

NASA says its Cassini spacecraft will soon be making its closest pass over Saturn's moon Dione, and observing the atmosphere of Titan, In an action-packed day and a half, NASA's Cassini spacecraft will be making its closest swoop over the surface of Saturn's moon Dione and scrutinizing the atmosphere of Titan, Saturn's largest moon. NASA's Cassini spacecraft has successfully completed its closest flyby of Saturn's moon Rhea, returning raw images of the icy moon's surface. A quartet of Saturn's moons, from tiny to huge, surround and are embedded within the planet's rings in this Cassini composition.