Monday, November 19, 2007

Whats an aurora?

Is this pic of an Aurora real or a hoax?



Aurora in the Distance
Credit & Copyright: Lance McVay
Click on pic to enlarge.

This real picture of a sub-visual aurora can only be seen by a camera because the human eye only accumulates light for a fraction of a second at a time, while a camera shutter can be left open indefinitely. Click here for more info. Or click here for NASA's Astronomy Picture of the Day Archive.

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