Named for the Roman goddess of dawn, the aurora borealis and aurora australis—also known as the northern and southern lights, respectively—are held among the most magnificent natural phenomena. The luminous nighttime displays of colorful bands that ripple across the sky are most often seen along the edges of the Arctic and Antarctic. They are caused by charged particles from the Sun that become trapped in the Earth’s magnetic field and collide with air molecules. Do other planets have auroras? Discuss