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Vega 5VK The Vega 5VK spacecraft was designed for a mission combining a flyby of the planet Venus followed by an encounter with Halley's Comet. At Venus a lander with a small balloon would be dropped into the clouds.
Vega 5VS Unflown series of Venus probes (which also served as the basis for the Granat satellite). Original plans called for two versions, 5VS and 5VP, both weighing 4850 kg. 5VS was a Venus orbiter which would act as a relay station for a big Soviet-French balloon. The balloon was to be dropped into the Venusian atmosphere by the 5VP probe as it flew by Venus. Thereafter the 5VP would head for Halley's comet.
Fobos 1F The 1F spacecraft was flown on the Phobos mission to Mars, consisting of 2 nearly identical spacecraft. The mission included co-operation from 14 other nations including Sweden, Switzerland, Austria, France, West Germany, and the United States (who contributed the use of its Deep Space Network for tracking the twin spacecraft). The objectives of the dual mission were to 1) conduct studies of the interplanetary environment, 2) perform observations of the Sun, 3) characterize the plasma environment in the Martian vicinity, 4) conduct surface and atmospheric studies of Mars, and 5) study the surface composition of the Martian satellite Phobos.
  Mars M1 The Russian Mars 96 mission was designed to send an orbiter, two small autonomous stations, and two surface penetrators to Mars to investigate the evolution and contemporary physics of the planet by studying the physical and chemical processes which took place in the past and which currently take place.

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© Mark Wade, 1997 - 2008 except where otherwise noted.