Aurora explained

Auroras occur when charged particles from the Sun collide with atoms and molecules in Earth’s upper atmosphere. Energy produced by these collisions is released in the form of light. As billions of these tiny flashes occur in sequence, the lights appear to move or “dance.” Auroras are most common near the Polar regions, where Earth’s magnetic fields intersect the planet. In the Northern hemisphere, the lights are named aurora borealis, or Northern Lights, while in the southern hemisphere they are called aurora australis, or Southern Lights.