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Equatorial ridge on Iapetus : ウィキペディア英語版 | Equatorial ridge on Iapetus
Saturn's moon Iapetus has a long, 20-kilometer-high ridge running along most of its equator. It was discovered by the ''Cassini'' probe in 2004. The ridge's origin is unknown. There are bright areas on the sides of the equatorial ridge near Iapetus's bright trailing hemisphere, which were already visible in ''Voyager'' images appearing like mountains and were nicknamed the "Voyager Mountains".〔(Iapetus' "Voyager Mountains" )〕 ==Discovery==
Iapetus's equatorial ridge was discovered when the ''Cassini'' spacecraft imaged Iapetus on 31 December 2004. Peaks in the ridge rise more than 20 km above the surrounding plains, making them some of the tallest mountains in the Solar System. The ridge forms a complex system including isolated peaks, segments of more than 200 km and sections with three near parallel ridges.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Equatorial ridge on Iapetus」の詳細全文を読む
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