Explanation: What formed Ariel's valleys? This question presented itself when Voyager 2 passed this satellite of Uranus in January 1986. Speculation includes that heating caused by the ancient tides of Uranus caused moonquakes and massive shifting of the moon's surface. In any event, a huge network of sunken valleys was found to cover this frozen moon, and some unknown material now coats the bottoms of many of these channels. Ariel is the second closest to Uranus outside of Miranda, and is composed of roughly half water ice and half rock. Ariel was discovered by William Lassell in 1851.

Information: The Scale of the Universe Debate in April 1996

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Publikacii s klyuchevymi slovami: Uranus - valley - sputniki Urana - Uran - Ariel' Publikacii so slovami: Uranus - valley - sputniki Urana - Uran - Ariel'
Sm. takzhe: Shekspir v kosmose Krovavaya Luna i ledyanoi gigant Uran i ego sputniki v dvizhenii Verona Rupes: samaya vysokaya skala v Solnechnoi sisteme Protivostoyanie dvuh planet Naprotiv Solnca Marsianskoe ushel'e Vse publikacii na tu zhe temu >>