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Auroras, also known as northern and southern (polar) lights or aurorae (singular: aurora), are natural light displays in the sky, usually observed at night, particularly in the polar regions. They typically occur in the ionosphere. They are also referred to as polar auroras. This is a misnomer however, because they are commonly visible between 65 to 72 degrees north and south latitudes, which would place it in a ring just within the Arctic and Antarctic circles. Aurorae do occur deeper inside the polar regions, but these are infrequent occurrences, and these are often invisible to the naked eye.

In northern latitudes, the effect is known as the aurora borealis, named after the Roman goddess of dawn, Aurora, and the Greek name for the north wind, Boreas, by Pierre Gassendi in 1621. The aurora borealis is also called the northern polar lights, as it is only visible in the sky from the Northern Hemisphere, with the chance of visibility increasing with proximity to the North Magnetic Pole. (Earth's is currently in the arctic islands of northern Canada.) Auroras seen near the magnetic pole may be high overhead, but from further away, they illuminate the northern horizon as a greenish glow or sometimes a faint red, as if the Sun were rising from an unusual direction. The aurora borealis most often occurs near the equinoxes. The northern lights have had a number of names throughout history. The Cree call this phenomenon the "Dance of the Spirits." In the Middle Ages the auroras have been called a sign from God (see Wilfried Schröder, Das Phänomen des Polarlichts, Darmstadt 1984).

Its southern counterpart, the aurora australis or the southern polar lights, has similar properties, but is only visible from high southern latitudes in Antarctica, South America, or Australasia. Australis is the Latin word for "of the South."

Auroras can be spotted throughout the world and on other planets. It is most visible closer to the poles due to the longer periods of darkness and the magnetic field.
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Travel, Nature, Photography, Astronomy, Northern Lights, Auroras, Aurora Borealis

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review by . August 06, 2010
posted in Earth Watch
Nature's Orchestra
Commonly known as Northern Lights, it's one of the natural wonders of the world. For some lucky few, especially those who are currently residing in Scandinavia, Canada and Northern U.S.A., Aug. 4, 2010 was the day where the recent solar tsunami sparked incredible auroras across the skyline of the northern hemisphere.       I first experienced this incredible view back in Coldfoot, Alaska in the middle of winter 2004. It took me a great deal of effort to get there especially …
Quick Tip by . January 28, 2012
posted in Images
Caption
One of the most magical wonders of life and planet Earth! Brace the cold and you'd be rewarded with such a wonderful view that you'd never ever get over the experience. See for yourself... if not in person, then at least this awesome video!     
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