13. Bölüm: 13. Bölüm

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In 1977 Voyager 2, the most ambitious of all space-craft, was launched toward the outer planets. Since then it has surveyed Jupiter, Saturn, Uranus and Neptune in turn, and has sent back amazing pictures as well as a vast amount of new information. Patrick Moore sums up what Voyager has told us, and goes on a grand tour of the outer solar system.