New Hampshire Astronomical SocietyMay 30th in Astronomy and Space Science
 | 1971 | US launches the Mariner 9 spacecraft to Mars. It is a twin of Mariner 8, which was destroyed at launch two weeks earlier. Mariner 9 arrives at Mars on 13 November 1971. It maps the entire surface, sends back 7,329 photographs, and takes atmospheric and temperature measurements. The spacecraft continued to function until it exhausted it's maneuvering propellant and was switched off on 27 October 1972. |
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