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Phobos: Anti-Mars hemisphere Mars Express captured this image of the "farside" of Phobos on January 3, 2007, on orbit number 3,843. The view shows terrain not visible to lower-altitude Mars orbiters. The view peeks slightly over the north pole (which is located just above the top of the prominent crater on the terminator near the top of this image). ESA/DLR/FU Berlin (G. Neukum) / Emily Lakdawalla