10. Aurora borealis, the northern lights
The Northern Lights usually circle the globe in a circular or elliptical “oval” centered on the earth’s North Magnetic Pole, which is not at the same location as the North Geographic Pole, but rather is slightly offset in the direction of northern Canada. This oval is known as the “auroral oval”. Auroral displays aren’t strongest at the North Magnetic Pole; the area of greatest auroral activity is usually right under the auroral oval, which changes dynamically according to how the solar wind is flowing on any particular night.