Wednesday, July 08, 2009

:: LightOfTheNightSky ::

Look at these pictures
it's such a beautiful and breath-taking phenomenon












The vertical columns of light have been appearing along with frigid temperatures at lower latitudes.













Though light pillars are often caused by artificial light, sun pillars, as in this picture, occur when sunlight reflects off the facets of millions of flat ice crystals in very cold air.














Here the ice crystals have clumped into layers in an ice fog rather than spreading out evenly--according to physicist Les Cowley. As a result, light shining up from artificial sources, such as streetlights, is turned into dotted lines in the sky.














Aided by abundant ice crystals formed during a European cold snap, these light pillars--like other trumpet-shaped pillars--may have been formed by long, thin crystals, rather than the horizontal crystal plates that form the more spike-like light pillars, according to physicist Les Cowley.

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