An aurora[a] (pl. aurorae or auroras)[b] is a natural light display in Earth’s sky, predominantly observed in high-latitude regions around the Arctic and Antarctic. The terms northern lights (aurora borealis) and southern lights (aurora australis) are used in the Northern and Southern Hemispheres respectively.[3][c] Auroras display dynamic patterns of radiant light that appear as curtains, rays, spirals or dynamic flickers covering the entire sky.