Under NASA's plan, a spacecraft would get to the asteroid in the early 2020s — then pluck a car-sized boulder from the surface and head back toward Earth, to put the boulder in orbit around the moon. NASA hide caption

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NASA

NASA's Other Asteroid Mission: Grab A Chunk And Put It In Orbit Around The Moon

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A rocket carrying the OSIRIS-REx spacecraft lifts off at the Cape Canaveral Air Force Station in Florida on Thursday. The spacecraft aims to collect samples from the asteroid Bennu. John Raoux/AP hide caption

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John Raoux/AP

NASA Launches Mission To Retrieve Ancient Asteroid Dust

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Alex Longo makes a pitch at the Lunar and Planetary Institute in Houston, Texas, in October 2015. The Institute sponsored the conference to pick a landing site for the first human landing on Mars. Long has proposed a site for a different mission — a rover landing. Bill Ingalls/NASA hide caption

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Bill Ingalls/NASA

A Teen Might Pick The Landing Site For NASA's Next Mars Rover

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NASA's Juno spacecraft captured this view on Aug. 27 as it closed in on Jupiter's north pole, about two hours before the probe's nearest approach. NASA/JPL-Caltech/SwRI/MSSS hide caption

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NASA/JPL-Caltech/SwRI/MSSS

NASA Probe Takes First-Ever Close-Up Images Of Jupiter's North Pole

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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 hide caption

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NASA/JPL

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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NASA/JPL-Caltech

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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NASA/JPL-Caltech

'Star Trackers' Help Juno Find Its Way

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