Visibility I / V
I drove a car when I noticed a previously unseen phenomenon in the sky for myself. At the top was a round slightly brighter mold that formed down than the smoke from the jet engine. The phenomenon seemed to float in place.
I saw it quite far in the dark sky, stopped the car and shot for a moment. After a while, it began to dim and felt like it was moving away gently upward and evaporating into the invisible.