Explanation: This bizarre, equatorial ridge extending across and beyond the dark, leading hemisphere of Iapetus gives the two-toned Saturnian moon a distinct walnut shape. With red/blue glasses you can check out a remarkable stereo composition of this extraordinary feature -- based on close-up images from this week's Cassini spacecraft flyby. In fact, the ridge's combination of equatorial symmetry and scale, about 20 kilometers wide and reaching up to 20 kilometers above the surface, is not known to be duplicated anywhere else in our solar system. The unique feature was discovered in Cassini images from 2004. It appears to be heavily cratered and therefore ancient, but the origin of the equatorial ridge on Iapetus remains a mystery.

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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: Iapetus - Yapet - sputniki Saturna Publikacii so slovami: Iapetus - Yapet - sputniki Saturna
Sm. takzhe: Stereo-Elena Sputnik Saturna Elena v cvete Giperion: sputnik Saturna so strannymi kraterami Yapet: sputnik Saturna so strannoi poverhnost'yu Saturn, Tefiya, kol'ca i teni Sputniki Saturna za predelami ego kolec Raznocvetnyi sputnik Saturna Yapet: stereofotografiya Vse publikacii na tu zhe temu >>