If the maneuver failed, there would be no second chance. After twelve years of flying, Voyager 2 finally approached the last planet on its long journey. Brad Smith and his team celebrated their navigational triumph. But they secretly worried that this giant might prove as unspectacular as Uranus. Neptune had something weird and uncanny about it.
Tremendous storms rage on the planet.
This came as a great surprise to the astronomers. After all, the sun's energy barely penetrates to this place at the edge of solar system. So once a storm arises, it simply keeps going. But to this day, no one really knows how they were created and why Neptune doesn't have a complete system of rings. Voyager's grand mission was almost accomplished.