Scientist: Mark Showalter
Maps of the planets! This is a good way of getting heightmaps, and it's also easy to get a corresponding texture for the same area. For Mars, the heightmap data set is the "Mars MOLA Digital Terrain Map". For the Moon, it's "Kaguya Laser Altimeter Topo" and "LOLA GDR Digital Elevation Model". The cluster of controls in the upper-left can change the resolution of the image you're downloading.