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offers news, photos, and timetables for the twin spacecraft program. One spacecraft, launched December 11, 1998 will orbit the planet and observe the global distribution and time variation of the Martian atmosphere. The other spacecraft, launched 1999 January 3 and expected to land on December 3, will land for the first time in the polar regions. Microprobes, two meters deep, will attempt to detect water ice in the Martian subsurface. (National Aeronautics and Space Administration)
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