Body
Uranus
The sideways planet: its axis lies nearly in its orbital plane.
The sideways planet — knocked onto its side long ago, it rolls around the Sun with its poles taking turns facing sunward for 42 years each. Visited exactly once, by Voyager 2.
Visited by
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Voyager 2
The only spacecraft to visit all four giant planets — still calling home from interstellar space.
year: 1986 · encounter: flyby