We had guests at the hotel yesterday, watching the northern lights for 3 hours, until they went to sleep.
The science behind the northern lights
But what exactly are the northern lights? It is the sun that lies behind the formation of the auroras. During large solar explosions and flares, huge quantities of particles are thrown out of the sun and into deep space.
When the particles meet the Earth's magnetic shield, they are led towards a circle around the magnetic North Pole, where they interact with the upper layers of the atmosphere. The energy which is then released is the northern lights. All this happens approximatelty 100 kilometres above our heads.