Northern Lights. The explanation
This video, from the department of Physics in the University of Oslo, provides a very simple but extremely comprehensive explanation of the space events which are responsible to the creation of the aurora phenomenon at the poles of our planet. The aurora, depending on the intensity of the solar storm, is visible in certain areas of the earth which are close to its poles, like the North Norway, Alaska at US and many others.
A video about 'The Aurora'.
An advice: Watch this video on Full Screen by clicking on the bottom right button of the player.
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