An artist's rendering depicts the satellite ISEE-3/ICE during its planned lunar fly-by in August 2014. Mark Maxwell/Courtesy ISEE-3 Reboot Project hide caption

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To Save A Satellite, Former NASA Guy Takes Crowdfunding To Space

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Mark Kelly (left) will stay on Earth while his brother, Scott Kelly, spends a year on the International Space Station. NASA will test how the environments affect them differently. NBC NewsWire/NBCU Photo Bank via Getty Images hide caption

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Astronaut Twins To Separate For The Sake Of Space Travel

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An artist's rendering of Kepler-186f, the first validated Earth-size planet to orbit in the habitable zone of a distant star. T. Pyle/NASA/SETI Institute/JPL-Caltech hide caption

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Scientists Spot A Planet That Looks Like 'Earth's Cousin'

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For A Fast Track To Blossom, Just Send Some Seeds To Space

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The disturbance visible at the outer edge of Saturn's A ring in this image from NASA's Cassini spacecraft results from gravitational effects on ring particles by an object that may be replaying the birth process of icy moons. NASA/JPL-Caltech/Space Science Institute hide caption

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For All You Need To Know About The Blood Moon, Ask Mr. Eclipse

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Where's the moon rock? Curators say national treasures are often overlooked in the museum's current display, which hasn't changed much since 1976. National Air and Space Museum, Smithsonian Institution hide caption

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Smithsonian's Air And Space Museum To Get $30 Million Spiffier

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