An aurora is a polar regions natural light display, caused by the collision of charged particles directed by the Earth’s magnetic field. An aurora typically occurs in the ionosphere and is usually observed at night. It is also referred to as a polar aurora or as polar lights. In northern latitudes the effect is known as the aurora borealis or the northern lights and in southern counterpart it has another name: aurora australis or the southern lights.
Auroras do occur deeper inside the polar regions, but these are infrequent and often invisible to the naked eye. Read more