Aurora Borealis, more commonly referred to as the northern lights, are the result of solar winds interacting with oxygen and nitrogen elements that only enter the Earth’s atmosphere in the Arctic Circle and Antarctica. While the flickering, waving lights may look incredibly close to us as they dance across the sky, they never get closer than 50 miles above the Earth’s surface, in the thermosphere layer of our planet’s atmosphere.
The color of the lights depends on the element and the altitude of the interaction: Blue and violet lights typically occur in interactions between 50-60 miles away, while green—the most commonly seen color—occurs between 60-150 miles away. Red colors often occur at over 150 miles above the Earth’s surface.