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Mercury
Winter 2008 Table of Contents


Image courtesy of NASA / JHUAPL / Carnegie Institution
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MESSENGER's
First Look at Mercury's Previously Unseen Side
NASA
/ JHUAPL
When
Mariner 10 flew past Mercury three times in 1974 and 1975, the same
hemisphere was in sunlight during each encounter. As a consequence,
Mariner 10 was able to image less than half the planet.
On
January 14, 2008, the MESSENGER spacecraft observed about half of
the hemisphere missed by Mariner 10. Other images obtained during
the flyby will reveal surface features in color and in much more
detail. Collectively, these images and measurements made by other
MESSENGER instruments will soon provide a detailed global view of
the surface of Mercury, yielding key information for understanding
the formation and geologic history of the innermost planet.
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