How r the auroras formed at the poles?

Valkyries galloping on their horses across the northern sky

The sun emits charged particles, when these particles collide with the oxygen, nitrogen and other gases in our atmosphere they get ionized and display those colors.

How r the auroras formed at the poles?virus

Charged particles from the Sun collide with particles in the Earth's atmosphere, which ionizes them and causes them to emit light. The Earth's magnetic field funnels the Sun's particles toward the poles, which is why auroras are generally seen only from high latitudes.