Beskrivning : The Mariner Mars 71 mission was planned to consist of two spacecraft to orbit Mars on complementary missions, but due to the failure of Mariner 8 to launch properly, only one spacecraft was available. Mariner 9 combined mission objectives of both Mariner 8 (mapping 70 % of the Martian surface) and Mariner 9 (a study of temporal changes in the Martian atmosphere and on the Martian surface). Mariner 9 was the first spacecraft to orbit another planet.
Kennedy Space Center post stamp and leaving of Mariner 9 sonde.

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MARINER 9 (MARTIAN ORBITER) · ATLAS SLV3C · 1ST TO ORBIT ANOTHER PLANET