Friday, August 17, 2007

My playlist of Aurora Videos at youtube


Some beautiful videos of Aurora...

Aurora was first mentioned by Ancient Greek explorer- geographer Pytheas. An aurora (plural aurorae/auroras) is a bright glow observed in the night sky, usually in the polar zone. For this reason some scientists call it a "polar aurora" (or "aurora polaris"). In northern latitudes, it is known as the aurora borealis, which is named after the Roman goddess of the dawn, Aurora, and the Greek name for north wind, Boreas. Especially in Europe, it often appears as a reddish glow on the northern horizon, as if the sun were rising from an unusual direction. The aurora borealis is also called the northern lights since it is only visible in the North sky from the Northern Hemisphere. The aurora borealis most often occurs from September to October and from March to April. Its southern counterpart, aurora australis, has similar properties. Australis is the Latin word for "of the South".

The aurora's are caused by radioactive particles hitting the Earth's Atomsphere.Here's how this happens. when there are sunspots on the sun , and the activity on the Sun is really high ,sunspots throw out plumes of gases and radio active material millions of miles into space .They are carried by the solar winds first to the nearest planet Mecury and so on down the line until it reaches our Planet Earth . At the core of our planet is magnetized magma, liquid rock .magnetic force concentrates at the poles. its this magnetismthat protects our atmosphere and the consentration of magnatism that cause the aurora borealis (NOTHERN LIGHTS),and aurora australis (SOUTHERN LIGHTS).they are usually green in color, but can be any other color as well.They look like a gigantic ribbon dancing accross the sky.


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