Sunlight scattered by the atmosphere on cloudless mornings during the hour before sunrise inspires a subtle feeling (“this is cool, maybe even exciting”) that I never noticed till I started intentionally exposing myself to it for health reasons (specifically, making it easier to fall asleep 18 hours later).
More precisely, I might or might not have noticed the feeling, but if I did notice it, I quickly forgot about it because I had no idea how to reproduce it.
I have to get away from artificial light (streetlamps) (and from direct (yellow) sunlight) for the (blue) indirect sunlight to have this effect. Also, it is no good looking at a small patch of sky, e.g., through a window in a building: most or all of the upper half of my field of vision must be receiving this indirect sunlight. (The intrinsically-photosensitive retinal ganglion cells are all over the bottom half of the retina, but absent from the top half.)
Sunlight scattered by the atmosphere on cloudless mornings during the hour before sunrise inspires a subtle feeling (“this is cool, maybe even exciting”) that I never noticed till I started intentionally exposing myself to it for health reasons (specifically, making it easier to fall asleep 18 hours later).
More precisely, I might or might not have noticed the feeling, but if I did notice it, I quickly forgot about it because I had no idea how to reproduce it.
I have to get away from artificial light (streetlamps) (and from direct (yellow) sunlight) for the (blue) indirect sunlight to have this effect. Also, it is no good looking at a small patch of sky, e.g., through a window in a building: most or all of the upper half of my field of vision must be receiving this indirect sunlight. (The intrinsically-photosensitive retinal ganglion cells are all over the bottom half of the retina, but absent from the top half.)