Messenger's wide-angle color camera can image in 11 colors, ranging from visible through near-infrared. In this image the 1000 nanometer, 750 nm, and 430 nm filters are displayed in red, green, and blue, respectively. Some minerals absorb more light at longer wavelengths than at shorter ones and NASA hopes that the different color images will disclose more information about the variation in the composition of Mercury's surface.
Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington