Physics of Uranus
* Diameter:51,500 km (32,000 miles)
* Temperature: -197.15 C (-322.87° F)
* Orbit: Takes 84 years to complete an orbit.
* Average Distance: 2,870,972,200 km (1,783,939,400 miles - 19.2 AU) from Sun
* Mass: 8.6849 x 1025 kg
* Moons: 27
* Period of Rotation: 17.24 hours (retrograde: spins backwards compared to most other planets)
Uranus' atmosphere is made of 83% hydrogen, 15% helium and 2% methane; they also found some water and ammonia in its atmosphere. The planet has blue-green color, due to the methane gas above the cloud layer.
Uranus is also the only planet in our solar system who's axis is tilted at 98 degrees, scientists believe that this is due to a collision long ago.
Uranus has no solid surface; most of Uranus's gasses consist of water, ammonia and methane. It is uncertain but Uranus might contain a small, silicate-rich core. The surface area of uranus is about 8,115,600,000 km2 .
