Watching the behavior and form of clouds in our sky, you can see interesting events.
The photo shows how the sky is conditionally divided into two parts. As if he had something cut into two parts. And the parts themselves do not look like one for one. All this happens because the sky is not a constant substance or a motionless body. In the sky there are all the same processes as on earth. Just the sky substance is less dense, airy, that's all the weird stuff right overhead.
