Overview:
Year: About 84 Earth years.
Day: About 17 Earth hours.
Diameter: About 31,500 miles.
Effective temperature: -357 degrees Fahrenheit.
Atmosphere: Hydrogen, helium, methane. Uranus is the seventh planet from the sun. It has the third-largest radius of all the planets. It has 13 faint rings and 27 small moons. But a characteristic that sets Uranus apart: It spins on its side as it orbits the sun. That trip takes about 84 Earth years.
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