Editing Space exploration (section)

===Neptune===
{{main|Exploration of Neptune}}The exploration of Neptune began with the 25 August 1989 ''[[Voyager 2]]'' flyby, the sole visit to the system as of {{CURRENTYEAR}}. The possibility of a [[Neptune Orbiter]] has been discussed, but no other missions have been given serious thought.

Although the extremely uniform appearance of Uranus during ''Voyager 2''{{'}}s visit in 1986 had led to expectations that Neptune would also have few visible atmospheric phenomena, the spacecraft found that Neptune had obvious banding, visible clouds, [[Aurora (astronomy)|auroras]], and even a conspicuous [[Great Dark Spot|anticyclone storm system]] rivaled in size only by Jupiter's [[Great Red Spot]]. Neptune also proved to have the fastest winds of any planet in the Solar System, measured as high as 2,100&nbsp;km/h.<ref name="Suomi1991">{{cite journal |last1=Suomi |first1=V. E. |last2=Limaye |first2=S. S. |last3=Johnson |first3=D. R. |year=1991 |title=High winds of Neptune: A possible mechanism |journal=Science |volume=251 |issue=4996 |pages=929–932 |bibcode=1991Sci...251..929S |doi=10.1126/science.251.4996.929 |pmid=17847386 |s2cid=46419483}}</ref> ''Voyager 2'' also examined [[Rings of Neptune|Neptune's ring]] and [[Moons of Neptune|moon system]]. It discovered 900 complete rings and additional partial ring "arcs" around Neptune. In addition to examining Neptune's three previously known moons, ''Voyager 2'' also discovered five previously unknown moons, one of which, [[Proteus (moon)|Proteus]], proved to be the last largest moon in the system. Data from ''Voyager 2'' supported the view that Neptune's largest moon, [[Triton (moon)|Triton]], is a captured [[Kuiper belt]] object.<ref name="Agnor06">{{cite journal |last1=Agnor |first1=C. B. |last2=Hamilton |first2=D. P. |year=2006 |title=Neptune's capture of its moon Triton in a binary-planet gravitational encounter |journal=Nature |volume=441 |issue=7090 |pages=192–194 |bibcode=2006Natur.441..192A |doi=10.1038/nature04792 |pmid=16688170 |s2cid=4420518}}</ref>