Has your opinion, what are these two pictures?

These two pictures are auroras.

Auroras are natural colored light displas, which are usually observed in te night sky, particulary in the polar zone. Some scientists therefore call them "polar auroras" (or "aurorae polaris").

In nothern latitudes, it is know as the aurora borealis, which is also called the nothern lights, as it is only visible in the North sky from the Nothern Hemisphere. The aurora borealis most often occurs from September to October and from March to April.

In southern counterpart, aurora australis, has similar properties. Australis is the Latin word for "of the South".

Auroras are now know to be caused by the collision of charged particles found in the magnetopshere, with atoms in the Earth's upper atmosphere.