5 March 2008
Aurora Borealis above the Talkeetna Range
Posted by Debo Hobo under: General .
The Aurora Borealis spins above the Talkeetna Range and a hay field on Farm Loop Road near Palmer, Alaska. The center of the circular corona, usually near Earth’s north pole sometimes fluctuates further south and can be seen from a lower latitude as in this instance. (AP Photo/Bob Martinson).
Images of aurora are significantly more common today due to the rise of use of digital cameras that have high enough sensitivities. Film and digital exposure to auroral displays is fraught with difficulties, particularly if faithfulness of reproduction is an objective. Due to the different spectral energy present, and changing dynamically throughout the exposure, the results are somewhat unpredictable. Different layers of the film emulsion respond differently to lower light levels, and choice of film can be very important. Longer exposures aggregate the rapidly changing energy and often blanket the dynamic attribute of a display. Higher sensitivity creates issues with graininess.
Auroras (Polar Lights; or aurorae, sing.: aurora) are natural colored light displays, which are usually observed in the night sky, particularly in the polar zone. Some scientists call them “polar auroras” (or “aurorae polaris”). In northern latitudes, it is known as the aurora borealis, named after the Roman goddess of dawn, Aurora, and the Greek name for north wind, Boreas. It often appears as a greenish glow (or sometimes a faint red), as if the sun were rising from an unusual direction. The aurora borealis is also called the northern polar lights, as 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, the aurora australis/southern polar lights, has similar properties. Australis is the Latin word for “of the South”. Read more…
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I would love to see an auroa one day. It’ll bring more light to my heart!
Thanks for commenting to my blog post, today, very much appreciated!
I would love to see those northern lights too.:-)
The photos almost look like illustrations or CGI, perhaps because of the unusual colors, as compared with the sky we normally see.
Wow! Thanks for gorgeous pics.
Fabtastic! I hope to see one of them, one day… It’s one of my dreams… Thanks for the photos!
Beautiful photos! I just came across your blog on MyBlogLog. Thanks so much for sharing the tips. How would your recommend shooting with a digital camera w/ the problems you’ve outlined here?
-Suz
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