This is the APOD from September 5th, 2012. In this picture the little and big dipper are drawn out so they can be seen and the main focus of this picture is the green glowing among the stars. When the sky and all other conditions are right, the faint glow can be seen from earth. It is about 90 kilometers away. This can often be seen out in space looking in too. This is caused by very excited atoms that are being influenced by ultraviolet rays. Similar phenomenon can be caused by lightning and aurorae. To even have the possibility of seeing this image you would need a camera with a very wide lens and with a long exposure.
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