Flash Modin writes: In one month, NASA's MESSENGER spacecraft will become the first to orbit the planet Mercury. After it's seven year journey across the solar system, the spacecraft will park in orbit and begin a one year mission to study the innermost planet. Until MESSENGER, nearly half of the planet had never been imaged and large blank spots still exist on its maps. Sean Solomon, the mission's head, says NASA hopes to solve long-standing mysteries about Mercury's formation, composition and its dynamic atmosphere.
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