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Sunday, 21 June 2015

Aurora Australis

Aurora Australis

Have you ever witnessed nature’s light show  dancing across the night sky?  This colourful display is often referred to, and known as ‘The Southern Lights’.   What causes this spectacular illumination , Aurora Australis?

Firstly, the solar flares get shot off the sun in extreme speed. The sun is always active so solar flares are quite common. This solar flare ejects electrons, ions and atoms out into our solar system. These ions, atoms and electrons travel through space.

When they reach Earth,  the Earth’s magnetic field  stops these particles as it acts as an invisible shield. Because of the shape of the magnetic field all these atoms and ions get  directed  to the Southern and Northern poles.  As they follow the magnetic field they speed up and release energy in the form of light.

The colours are reported to be pink, blue, purple and red.  The different types of atoms determines the differing colours of the aurora.    

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