Uranus has five large moons; the Voyager 2 discovered 10 smaller ones and experts believe that within the rings there are 11 more very small satellites. There are a total of 27 moons on Uranus. The Voyager 2 is a spacecraft that went to Uranus in 1986 to learn this information.
Uranus has 13 rings and it appears a greenish-blue color due to its composition that include helium, hydrogen and methane. The methane is responsible for the color. William Herschel discovered this planet on March 13, 1781, when he was looking at the sky using his telescope. Many people viewed it before, but they ignored it due to thinking it was another star.