A Cliff Looming on Comet 67P . ... Credit Copyright: ESA , Rosetta , NAVCAM Explanation: What that looming behind this gravel-strewn hill on Comet ChuryumovGerasimenko? A jagged cliff. The unusual double-lobed nucleus of Comet 67P/ChuryumovGerasimenko lends itself to unusual and dramatic vistas, another of which has been captured by the Rosetta spacecraft that arrived at the comet last September. ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ...