How many probes have been sent to Mercury?


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Mercury Mercury has only been visited by one NASA probe, Mariner 10, which was launched on November 3, 1973, and made fly-by passes of the planets Venus and Mercury. The probe passed by Mercury three times : March 29, 1974 at a distance of 703 km, September 21, 1974 at 48069 km, and March 16, 1975 at 327 km. ChaCha!

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