Leonardo da Vinci Quote
I find that any luminous body when seen through a dense and thick mist diminishes in proportion to its distance from the eye. Thus it is with the sun by day, as well as the moon and the other eternal lights by night. And when the air is clear, these luminaries appear larger in proportion as they are farther from the eye.
The Notebooks of Leonardo da Vinci (Richter, 1888) - IV Perspective of Disappearance