Animation of 3D perspective view of Mercury’s great valley. The animation begins with Mercury’s great valley, as seen in a high incidence angle image mosaic obtained by NASA’s MESSENGER spacecraft, extending from the Rembrandt basin (upper right) for over 1,000 km (lower left). The image mosaic transforms into a colorized digital elevation model created from stereo images of the region. The vertical exaggeration, the difference between the vertical and horizontal scale, is increased until it reaches about 8× to emphasis the topographic relief.