Uranus
50,724 kmacross
Uranus is 50,724 km across (4.0× wider than Earth) and orbits the Sun at 19.2 AU — about 2,872,279,104 km. Sunlight takes 2.7 hours to reach it. A featureless blue-green ice giant, tipped almost entirely onto its side.
▶ Visit Uranus in 3D
What kind of world is it?
Something enormous hit Uranus early in its history — it orbits the Sun rolling on its side, unique among the planets. It is also the coldest planet, colder even than more-distant Neptune, and has only ever been visited once: Voyager 2 flew past in 1986, our single close-up look.
Its 98° axial tilt means each pole spends ~42 years in continuous sunlight, then 42 years in darkness.
Uranus by the numbers
Diameter
50,724 km
Distance from the Sun
19.2 AU
Sunlight travel time
2.7 hours
Surface gravity
8.7 m/s²
Temperature
−195 °C
A day lasts
17 hours
A year lasts
84 Earth years
Known moons
29
Notable moons
Uranus has 29 known moons. The ones worth meeting:
Numbers only get you so far. The distances are the part nobody's brain handles — in the interactive view, switch to 1:1 scale and watch Uranus shrink to an honest speck on an enormous empty orbit.
Keep going
✓ Facts verified July 2026
Every figure on this page is a real, rounded value checked against primary sources. Found something out of date? See how we keep it accurate.