Uranus
CategoryOuter Planet
SystemSolar System
Diameter50724 km
Orbital Period84 years
About Uranus
Rotates on its side with an axial tilt of 98 degrees, likely from a massive ancient collision. The coldest planetary atmosphere at -224C. Discovered by William Herschel in 1781, the first planet found with a telescope. Has 13 known rings and 27 known moons. The blue-green color comes from methane in the atmosphere.