What are Auroras?

Auroras are natural colored light displays, which are usually observed in the night sky, particularly in the polar zone. Some scientists call them "polar auroras" (or "aurorae polares"). In northern latitudes , it is known as the aurora borealis, named after the Roman goddess of dawn, Aurora, and the Greek name for north wind, Boreas. It often appears as a greenish glow (or sometimes a faint red), as if the sun were rising from an unusual direction. The aurora borealis is also called the northern polar lights, as it is only visible in the North sky from the Northern Hemisphere. The aurora borealis most often occurs from September to October and from March to April.