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Goddard Space Flight Center is about to get medieval on some comets Goddard's Comet-Hunting Crossbow NASA/Rob Andreoli In Kepler, NASA has an exoplanet hunter. http://www.popsci.com/technology/article/2011-12/hunt-comets-nasa-building-giant-harpoon/

Video: To Hunt Comets, NASA is Building a Giant Harpoon

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http://www.nytimes.com/2010/04/20/science/space/20cassini.html?pagewanted=all

With Gravity's Help, Cassini Puts On a Saturn Spectacular

In six years of cruising around the planet Saturn and its neighborhood, the Cassini spacecraft has discovered two new Saturn rings, a bunch of new moons and a whole new class of moonlets. It encountered liquid lakes on the moon Titan, water ice and a particle plume on the moon Enceladus, ridges and ripples on the rings, and cyclones at Saturn’s poles. Cassini also released a European space probe that landed on Titan.