This globe of Mercury was assembled from thousands of images taken by NASA's MESSENGER spacecraft, which has been orbiting the planet since 2011. The colors are enhanced to show rocks of different composition and age. Rays from fresh impact craters appear light blue or white. Darker blues show areas of what's called "low reflectance material," and tan areas are lava plains.
Video: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington (0:15)