NASA Looks Back at 2014: From Earth to Mars and Beyond

December 28, 2014 1:26 AM

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What were the greatest NASA moments of 2014? One was the discovery of the first-known Earth-sized planet in the habitable zone of its star. Check out the others.(Photo : Getty Images)

What were the greatest NASA moments of 2014? One was the discovery of the first-known Earth-sized planet in the habitable zone of its star. Check out the others.

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