Diameter: 51118 km
SMA: 19.2294 AU
Period: 84.3811 years
Eccentricity: 0.044406
Rotation: -0.71833 days
Inclination: 0.8°
Axial tilt: 97.8°

Mass: 8.681x10²⁴kg
Density: 1270 kg/m³
Gravitation: 8.87 m/s²
Escape velocity: 21.3 m/s
Orbit velocity: 6.84 km/s (mean)

Moons: 27
83% hydrogen, 15% helium, 2% methane
gaseous

The seventh planet from the sun with the third largest diameter in our solar system, Uranus is very cold and windy. The ice giant is surrounded by 13 faint rings and 27 small moons as it rotates at a nearly 90-degree angle from the plane of its orbit. This unique tilt makes Uranus appear to spin on its side, orbiting the sun like a rolling ball. The first planet found with the aid of a telescope, Uranus was discovered in 1781 by astronomer William Herschel, although he originally thought it was either a comet or a star. It was two years later that the object was universally accepted as a new planet, in part because of observations by astronomer Johann Elert Bode.

William Herschel tried unsuccessfully to name his discovery Georgium Sidus after King George III. Instead the planet was named for Uranus, the Greek god of the sky, as suggested by Johann Bode. With a radius of 15,759.2 miles (25,362 km), Uranus is 4 times wider than Earth. If Earth was the size of a nickel, Uranus would be about as big as a softball.