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Uranus' ring system was the second to be discovered in the Solar System, after that of Saturn. [9] In 1982, on the fifth anniversary of the rings' discovery, Uranus along with the eight other planets recognized at the time (i.e. including Pluto) aligned on the same side of the Sun. [10] [11]
The largest is located twice as far from Uranus as the previously known rings. These new rings are so far from Uranus that they are called the "outer" ring system. Hubble also spotted two small satellites, one of which, Mab, shares its orbit with the outermost newly discovered ring. The new rings bring the total number of Uranian rings to 13. [162]
Uranus. Rings of Uranus; Complete list of Uranus's natural satellites. Miranda; Ariel; Umbriel; Titania; Oberon; Uranus trojan (2011 QF 99) Uranus-crossing minor ...
Rings of Uranus This page was last edited on 11 March 2018, at 16:18 (UTC). Text is available under the Creative Commons Attribution-ShareAlike 4.0 License ...
The two innermost moons, Cordelia and Ophelia, are shepherds of Uranus's ε ring, whereas the small moon Mab is a source of Uranus's outermost μ ring. [12] There may be two additional small (2–7 km in radius) undiscovered shepherd moons located about 100 km exterior to Uranus's α and β rings. [24]
A ring system is a disc or torus orbiting an astronomical object that is composed of solid material such as dust, meteoroids, planetoids, moonlets, or stellar objects. Ring systems are best known as planetary rings, common components of satellite systems around giant planets such as the rings of Saturn, or circumplanetary disks.
James Ludlow Elliot (June 17, 1943 – March 3, 2011) was an American astronomer and scientist who, as part of a team, discovered the rings around the planet Uranus. [2] [3] Elliot was also part of a team that observed global warming on Triton, the largest moon of Neptune. [4] [5]
With the super-sharp optics system used at the W. M. Keck Observatory, de Pater and Hammel found an 11th ring around Uranus, a narrow sheet of rocky debris. The ring, the innermost of its siblings, is about 3,500 kilometers (2,200 mi) wide and centered about 39,600 kilometers (24,600 mi) from the planet's core.