sábado, 12 de febrero de 2011

New Year's Aurora

On 7 January, the first big display of northern lights took place in Norway, near Tromso.  This aurora continued into the second week of the year. These auroras were rooted in strong gusts of solar wind. Auroras are created when such carged particles flow along Earth's magnetic field lines. The particles hit the atmosphere at the Poles and excite air molecules which release the extra energy as light.


This news attracts me a lot because the Auroras are very striking natural phenomena that only happen in a single place in the world, that few people have seen. This in  particular is the first and  the biggest Aurora in 2011.

aurora picture -- for a gallery of pictures of northern lights, or aurora borealis