This is a picture of the Aurora Australis, or Southern Lights, taken by Jeff Cohen in Halley, Antarctica. Jeff is part of the British Antarctic Survey, who've been there since 2003. The photo galleries are here, the blog is here, you can meet some Emperor penguins here, and you see the other photo albums, including Jeff's training course and his trip to the Faulkland Islands here.

This site gets an A+. A wonderful use of the Internet.