Toting a $12 million instrument built by the University of Colorado Boulder, NASA's Cassini spacecraft made the first of 22 dives between the rings of Saturn and the gaseous planet today, the beginning of the end for one of NASA's most successful missions ever.
On the rust-colored north flank of one of Earth's largest volcanoes, a backpack-sized instrument monitors our atmosphere and, at the same time, helps set the stage for possible human exploration of other worlds.
NASA's Cassini spacecraft ventured Wednesday into the never-before-explored region between Saturn and its rings.
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