Northern Lights switch on - Al Jazeera English

Northern Lights switch on

The Aurora Borealis has been in evidence over the last few nights.

Richard Angwin |

The Aurora Borealis, also known as the Northern Lights, has been visible at high latitudes over the last few nights.

This optical phenomenon results from the interaction between charged particles streaming away from the Sun upon the solar wind, and gas atoms in the upper part of the Earth’s atmosphere.

The Aurora is more likely to be visible during a period of high solar activity. 2013 sees a peak in the Sun’s  11 year solar cycle, although activity has been relatively low, so far.

Media Theorised

Media Theorised

In our latest online series we showcase the key works of five big thinkers from around the world – Noam Chomsky, Edward Said, Marshall McLuhan, Roland Barthes and Stuart Hall - whose theories on the media will sharpen your critical tools when you next consume the news.