How does the sun affect the aurora?

The sun influences the aurora through its solar wind, a stream of charged particles that it emits. When these particles collide with Earth's magnetic field and atmosphere, they excite gases like oxygen and nitrogen, causing them to emit light and create the stunning displays known as auroras. The intensity and location of auroras can vary based on solar activity, such as solar flares and coronal mass ejections, which increase the flow of solar particles toward Earth. Thus, the sun plays a crucial role in the formation and visibility of auroras, particularly near the polar regions.