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Events on Friday 25 August 1989 1
1989Voyager 2 flies by NeptuneFirst and only spacecraft to visit NeptuneNASA's Voyager 2 probe made its closest approach to Neptune, returning the first close-up images of the planet and its moon Triton. The flyby marked the end of Voyager 2's Grand Tour of the outer planets. It remains the only spacecraft to have visited Neptune.