What Causes the Aurora Borealis to Dance?

Imagine Earth is wrapped in an invisible bubble called a magnetosphere. This bubble protects us from the sun. Sometimes the sun blows hard, sending streams of tiny particles toward us like confetti.

When these particles hit our atmosphere, they wake up the gas atoms there. It is like rubbing balloons on your hair to make them stick.

The charged particles crash into gases like oxygen and nitrogen. This crash gives them energy. They release that energy as light. Green is the most common color because it comes from oxygen high up in the air. Red light comes from higher, thinner oxygen.

The earth spins and the sun moves. This changes how the particles hit us. Sometimes they come straight down. Other times they swirl around our magnetic lines like beads on a string. That swirling motion is why the lights seem to dance across the night sky.