How is aurora made of plasma?

Auroras are created when charged particles from the solar wind collide with gases in Earth's atmosphere, primarily oxygen and nitrogen. These charged particles, which are a form of plasma, excite the gas molecules, causing them to emit light as they return to their normal state. This process results in the stunning displays of light known as auroras, typically seen in polar regions. The colors of the aurora depend on the type of gas involved and the altitude of the collisions.