Mariner 9 Spacecraft
May 30, 1971
Credit | NASA/JPL-Caltech/GSFC |
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Mariner 9 was launched successfully on May 30, 1971, and became the first artificial satellite of Mars when it arrived and went into orbit, where it functioned in Martian orbit for nearly a year. Mariner 9 complete its final transmission October 27, 1972.