The First Long Contrail
It is very satisfying to notice the first long contrail, it’s one of the earliest warnings of a weather change. A front is likely on…
Tag: blue sky
Which Way Are We Looking?
Two questions today. I took this picture yesterday. Which direction are we looking? And a tougher one: what sign is there in this picture that…
Rayleigh Scattering
However clear the sky, however free from even the wispiest of clouds, the sky is never uniformly blue. It is always closer to white near…