Just when I thought I had enough of Rosetta's photos of Comet 67P/Churyumov-Gerasimenko, ESA has released this four-image mosaic that shows an incredible cliff more than one kilometer (0.62 miles) high. The image was taken from a distance of 20.1 kilometer on December 10. Here's another version, zoomed out.
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The image resolution is 1.71 m/pixel and the individual 1024 x 1024 frames measure 1.75 km across. The mosaic is slightly cropped and measures 2.9 x 2.6 km.