Sentence The word "Usanian" is not an accepted word in English and is not used formally in written English.
An example sentence could be, "The Usanians had a very distinct culture." However, if you are using the word to refer to citizens of the United States of America, you would use the adjective "American" instead.
Only 20 Uranian clouds have ever been seen, in a handful of images taken by Voyager 2 and the HST.
After more than eight years in space, Voyager 2 sped through the Uranian system on January 24 , 1986
Photographic images transmitted by the U.S. Voyager 2 spacecraft when it flew past the Uranian system in 1986 revealed that Oberon's surface is old and heavily cratered like the highlands of Earth's Moon.
Earth-based attempts to measure a property as basic as the planetary rotation period had produced widely differing values, ranging from 24 to 13 hours, until Voyager 2 finally established a 17.24-hour 17.24-hourerotation the Uranian interior.
Photographs taken by the U.S. Voyager 2 spacecraft during its flyby of the Uranian system in 1986 show that Ariel's surface is crisscrossed with scarps and long valleylike formations.
Because of the trajectory that the U.S. Voyager 2 spacecraft followed in its flyby of Uranus in 1986 (in order for it to be redirected to Neptune), the probe had the opportunity to study Miranda more closely than any other Uranian moon.
Like the other large Uranian moons, Ariel rotates synchronously with its orbital period, keeping the same face toward the planet and the same face forward in its orbit.
Images of the Uranian system, which totaled more than 8,000, revealed for the first time the weather patterns in the planet's atmosphere and the surface characteristics of the moons.
Miranda's density of 1.2 grams per cubic cm, which is somewhat less than those of the other major Uranian moons, suggests that it has a greater proportion of water ice to rocky material and other ices than these other bodies.
