"Radiance" Location "Radiance" is one of the pre-installed wallpaper images that comes with Windows XP. It is a telescopic photograph of the Moon's surface showing craters, mountains, and valleys ringing a vast gray plain bisected by the terminator between day and night. Long fascintated by the image, I have tried to identify its location on the lunar surface. I believe it is a photograph of Mare Imbrium (the Man in the Moon's right eye) taken during the Moon's last quarter. Lunar north is on the left. The prominent crater to the upper-left of center is Plato.