Congress is requiring NASA to travel to Jupiter's moon Europa by 2022. Currently, it is the space agency's only new mission planned for the outer solar system. NASA/JPL-Caltech/SETI Institute hide caption

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What Comes Next For NASA After Juno? Not Much

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When it named this mission, NASA acknowledged its difficulty. Juno was a Roman goddess, the agency notes, "who was Jupiter's wife, and who could also see through clouds." NASA/JPL-Caltech hide caption

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This illustration show's NASA's Juno mission approaching Jupiter. Juno used distant stars to chart its course across the void. NASA/JPL-Caltech hide caption

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'Star Trackers' Help Juno Find Its Way

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Buildings are seen shrouded in smog from the 102nd floor of Seoul's Lotte World Tower in December 2015. Bloomberg via Getty Images hide caption

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Korea's Air Is Dirty, But It's Not All Close-Neighbor China's Fault

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The last remaining space shuttle external propellant tank is moved across the 405 freeway in Los Angeles on Saturday. The ET-94 will be displayed with the retired space shuttle Endeavour at the California Science Center. Chris Carlson/AP hide caption

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This artist's concept depicts some of the planetary discoveries made by NASA's Kepler Space Telescope. Tuesday's announcement more than doubles the number of verified planets discovered by the Kepler mission. W. Stenzel/NASA hide caption

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NASA Spots 1,284 New Planets, Including 9 That Are 'Potentially Habitable'

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