Body
Neptune
The windiest world in the solar system, found by arithmetic before telescopes.
The windiest world we know — supersonic gusts near 2,000 km/h in an atmosphere painted deep blue by methane. Its existence was predicted by mathematics before it was seen through a telescope.
Visited by
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Voyager 2
The only spacecraft to visit all four giant planets — still calling home from interstellar space.
year: 1989 · encounter: flyby