The Solar System

Uranus

An ice giant that rolls round the Sun on its side, so each pole gets 42 years of daylight then 42 years of night.

Uranus
The ice giant Uranus as Voyager 2 saw it in January 1986, the only time a spacecraft has visited. Credit: NASA/JPL-Caltech, Public domain (NASA).
Size
51,118 km across. About 4.0 times as wide as Earth.
One year
84 Earth years
One day
17 h 14 min
Moons
29 known
Spacecraft
Only Voyager 2 has visited, flying past in January 1986.

Sizes and periods from NASA’s planetary fact sheets; moon counts from NASA Science.