During the long time exposure, the barn was lit with a battery powered spotlight using a technique called light painting.The aurora borealis or the northern lights are seen on the sky above the village of Ersfjordbotn near Tromso in northern Norway, late 12 February 2012. Aurorae are caused by the interaction between energetic charged particles from the Sun and gas molecules in the upper atmosphere of the Earth, about 100 kilometres up. A stream of charged particles, called the solar wind, flows out into space continuously from the Sun at speeds of 400-500 kilometres per second. Upon reaching Earth, the charged particles are drawn by Earth's magnetic field to the poles, where they collide with gas molecules in the upper atmosphere, causing them to emit light. EPA/MARTIAL TREZZINI
During the long time exposure, the barn was lit with a battery powered spotlight using a technique called light painting.The aurora borealis or the northern lights are seen on the sky above the village of Ersfjordbotn near Tromso in northern Norway, late 12 February 2012. Aurorae are caused by the interaction between energetic charged particles from the Sun and gas molecules in the upper atmosphere of the Earth, about 100 kilometres up. A stream of charged particles, called the solar wind, flows out into space continuously from the Sun at speeds of 400-500 kilometres per second. Upon reaching Earth, the charged particles are drawn by Earth's magnetic field to the poles, where they collide with gas molecules in the upper atmosphere, causing them to emit light. EPA/MARTIAL TREZZINI
