Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Rings_of_Uranus> ?p ?o }
- Rings_of_Uranus abstract "The planet Uranus has a system of rings intermediate in complexity between the more extensive set around Saturn and the simpler systems around Jupiter and Neptune. The rings of Uranus were discovered on March 10, 1977, by James L. Elliot, Edward W. Dunham, and Jessica Mink. More than 200 years ago, in 1789, William Herschel also reported observing rings; some modern astronomers are skeptical that he could have actually seen them, as they are very dark and faint – others are not.By 1978, nine distinct rings were identified. Two additional rings were discovered in 1986 in images taken by the Voyager 2 spacecraft, and two outer rings were found in 2003–2005 in Hubble Space Telescope photos. In the order of increasing distance from the planet the 13 known rings are designated 1986U2R/ζ, 6, 5, 4, α, β, η, γ, δ, λ, ε, ν and μ. Their radii range from about 38,000 km for the 1986U2R/ζ ring to about 98,000 km for the μ ring. Additional faint dust bands and incomplete arcs may exist between the main rings. The rings are extremely dark—the Bond albedo of the rings' particles does not exceed 2%. They are probably composed of water ice with the addition of some dark radiation-processed organics.The majority of Uranus's rings are opaque and only a few kilometers wide. The ring system contains little dust overall; it consists mostly of large bodies 0.2–20 m in diameter. However, some rings are optically thin: the broad and faint 1986U2R/ζ, μ and ν rings are made of small dust particles, while the narrow and faint λ ring also contains larger bodies. The relative lack of dust in the ring system is due to aerodynamic drag from the extended Uranian exosphere—corona.The rings of Uranus are thought to be relatively young, at not more than 600 million years old. The Uranian ring system probably originated from the collisional fragmentation of a number of moons that once existed around the planet. After colliding, the moons probably broke up into numerous particles, which survived as narrow and optically dense rings only in strictly confined zones of maximum stability.The mechanism that confines the narrow rings is not well understood. Initially it was assumed that every narrow ring had a pair of nearby shepherd moons corralling them into shape. However, in 1986 Voyager 2 discovered only one such shepherd pair (Cordelia and Ophelia) around the brightest ring (11 rings).".
- Rings_of_Uranus thumbnail Uranian_rings_scheme.png?width=300.
- Rings_of_Uranus wikiPageExternalLink 33.
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- Rings_of_Uranus wikiPageID "979232".
- Rings_of_Uranus wikiPageLength "49836".
- Rings_of_Uranus wikiPageOutDegree "124".
- Rings_of_Uranus wikiPageRevisionID "700470718".
- Rings_of_Uranus wikiPageWikiLink Aerodynamic_drag.
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- Rings_of_Uranus wikiPageWikiLinkText "13".
- Rings_of_Uranus wikiPageWikiLinkText "Epsilon ring".
- Rings_of_Uranus wikiPageWikiLinkText "Rings of Uranus".
- Rings_of_Uranus wikiPageWikiLinkText "Uranian ring system".
- Rings_of_Uranus wikiPageWikiLinkText "Uranian rings".
- Rings_of_Uranus wikiPageWikiLinkText "Uranus".
- Rings_of_Uranus wikiPageWikiLinkText "Uranus's ring system".
- Rings_of_Uranus wikiPageWikiLinkText "Uranus's rings".