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Can you drop a probe on a comet? A new iPhone game from NASA's Jet Propulsion Laboratory puts you in control of the Rosetta spacecraft as it prepares to intercept Comet 67P/Churyumov-Gerasimenko. Download it now . HOW TO EXPLORE AN EARTH-LIKE PLANET LIGHT YEARS AWAY: With NASA's Kepler spacecraft discovering alien worlds at a record pace, it seems to be just a matter of time before an Earth-sized planet is found in the "Goldilocks zone"--that is, in an orbit sized just right for liquid water and life. In today's story from Science@NASA, researchers discuss how they'll explore a cousin of Earth so many light years away. [ video ]
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