In order to describe human beings, he should keep the palm of his hand at a right angle to the floor.

Streaming through a gap in the eastern wall of 45 kilometer wide Hesiodus crater, the low-angle sunlight produces a long sunrise ray playing along the otherwise Shadowed crater floor.

Shadows projected onto the walls and floor result from the building's external structure's early planning that relates to the Angle of the SUNS light on the plot.