Mercury: Images of a Violent Planet

NASA's MESSGENGER spacecraft probes innermost planet in the solar system.

Mercury: Images of a Violent Planet

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In March, Mercury, Venus and the moon all appeared close together in Earth's sky. Impressive planetary conjunctions like this occur every few years. In the picture, taken on the morning of March 6, Mercury is the highest of the three bright celestial beacons. (NASA)
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