Why are aurora natural source of light?

Auroras are a natural source of light caused by the interaction between charged particles from the solar wind and the Earth's magnetic field and atmosphere. When these particles collide with gases like oxygen and nitrogen at high altitudes, they excite the atoms, causing them to emit light. This process produces the vibrant colors seen in auroras, primarily green, red, and purple, depending on the type of gas and the altitude of the collisions. The resulting displays are a beautiful manifestation of solar and atmospheric dynamics.