Mariner 10 - Third Mercury Flyby

Third Mercury Flyby

After losing roll control in October 1974, a third and final encounter, the closest to Mercury, took place on March 16, 1975, at a range of 327 km (203 mi), passing almost over the north pole.

  • Third Mercury encounter

  • Mercury in color

  • Mercury in black and white

  • Mercury in false-color

  • A prominent scarp, Discovery Rupes, photographed during first flyby

  • Representation of the thrust fault at Discovery Rupes

  • Australia region

  • Aurora region

  • Caduceata region

  • Old basin, 190 km in diameter, filled by smooth plains. The basin's hummocky rim is partly degraded and cratered by later events

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    —W.H. (Wystan Hugh)