Northern lights are a phenomenon that has fascinated people for centuries.
Colorful lights illuminating the night sky were observed in ancient China or in Greece. Nowadays the northern lights are a well-known phenomenon. We can explain the mechanisms that control it. We conduct regular observations and measurements from both the Earth and the space. We have mathematical models that help us predict when and where the aurora will appear.
What is and how is this phenomenon formed? What color can it have? Where can we see it? Does it affect our lives and our health? Is it only on Earth? What is the Kp index and what the Earth’s magnetic field and solar wind has to do with it?