Aurora Borealis

Aurora (plural auroras or aurorae) is a natural light show in the sky, especially in the polar regions caused by the collision of charged particles directed by the Earth's magnetic field. An aurora is usually observed at night and usually occurs in the ionosphere. Also known as a polar aurora or, collectively, as the polar lights. These phenomena are usually seen between 60 and 72 degrees latitude north and south, which puts them in a ring right in the Arctic and Antarctic polar circles. [Citation needed] The auroras occur deep within the polar regions, but these are rare and often invisible to the naked eye. 

In northern latitudes, the effect is known as the aurora borealis (or northern lights), named after the Roman goddess of dawn, Aurora, and the Greek name for north wind, Boreas, by Pierre Gassendi in 1621. The auroras were seen near the magnetic pole can be head high, but further, that illuminate the northern horizon as a greenish glow or sometimes a faint red, as if the sun were rising from an unusual direction. The aurora borealis most often occurs around the equinoxes. The northern lights have had a number of names throughout history. The Cree call this phenomenon the "Ghost Dance." In Europe, the Middle Ages, the aurora is commonly thought a sign from God (see Wilfried Schröder, Das Phänomen des Polarlichts, Darmstadt 1984).
Its southern counterpart, the Aurora Australis (or Southern Lights), has similar properties, and is visible from high southern latitudes in Antarctica, South America and Australia
Auroras can be seen around the world and other planets. They are most visible near the poles due to longer periods of darkness and the magnetic field.
Modern style guides recommend that the names of weather phenomena, such as the aurora borealis, that no capitals.