Voyager: The Interstellar Mission Selected Images From the Planetary Tour Neptune - 1989 Voyager 2 became the first spacecraft to observe Neptune when it flew past in 1989. Image left: A view of Neptune's great dark spot, which has since disappeared. Images right: Neptune's ring system (top). The moon Triton and its south polar ice cap (bottom). Go to next slide>> 1 2 3 4 5 6   Jet Propulsion Laboratory    California Institute of Technology   + Image index