Grand Tour, Card No 47 (RaceIntoSpace 1971)
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Card No. 47: The Grand Tour
The Grand Tour is a proposal by NASA for a reconnaissance mission in 1977-1978 to the outer planets of the solar system – Jupiter, Saturn, Uranus, Neptune and Pluto.
It is the most ambitious unmanned space project known at the present time. In 1977 the relative position of the five planets will be such that a 2,000 pound spacecraft, launched by a relatively small rocket, may be accelerated by gravity, as it passes each planet in turn, to such a speed that the journey to Neptune, which normally would take eighteen years, could be achieved in only nine years.
