How many rings does Uranus have?
When Galileo Galilei aimed a telescope at Saturn in 1610, he observed a number of objects around the planet that later turned out to be rings. In 1977, astronomers discovered that Uranus also has rings that probably consist of ice and dust.
In the first place, 5-6 rings were identified, but when the Voyager 2 space probe photographed the planet in 1986, the number increased to 11. In 2005, astronomers used the Hubble telescope to spot another two rings, so Uranus now has 13 known rings.
The rings are hard to oberve, as most of them are dark and only some 100 m thick. They are located 14,00072,000 km from the planet. The other huge planets of the Solar System, Jupiter and Neptune, also have rings, which were discovered in 1979 and 1989, respectively.
Just like Saturn, Uranus is surrounded by rings which are a few km wide. The rings consist of objects with diameters of 0.2-20 m.