The lunar crater Torricelli is seen located at the center of the image. It is a very interesting crater due to its 'pear-shaped' appearance. This shape originates from an adjacent collision which formed another crater that took out the west wall of the original, larger impact. Torricelli crater is some 30 km wide.
What is interesting in this image is the play of shadows that are produced by the adjacent lunar walls of Torricelli; however no shadows are cast by Toricelli's westernmost wall. Why? I leave it up to the readers to unravel this puzzle.
Comments are welcome.