Where night meets day

Got this photograph from one of my friends. It is absolutely stunning and so I thought I should share it with all of you out there. The best thing I like about the photograph is that the earth looks so serene.
Note: The text below the photograph says that the photo was taken during the last mission of the Columbia. But it seems that this is not true. Nevertheless, the photograph is awesome and definitely worth a look.
Sunset over Europe - click to enlarge (356 kb).

This photo is absolutely beautiful. Be sure to read the text below to have a better understanding of what you are viewing. It is historic too as this is the last mission for Columbia…
The photograph was taken by the crew on board the Columbia during its last mission, on a cloudless day. The picture is of Europe and Africa when the sun is setting. Half of the picture is in night. The bright dots you see are the cities’ lights.
The top part of Africa is the Sahara Desert.
Note that the lights are already on in Holland, Paris, and Barcelona, and that’s it’s still daylight in Dublin, London, Lisbon, and Madrid.
The sun is still shining on the Strait of Gibraltar. The Mediterranean Sea is already in darkness.
In the middle of the Atlantic Ocean you can see the Azores Islands; below them to the right are the Madeira Islands; a bit below are the Canary Islands; and further South, close to the farthest western point of Africa , are the Cape Verde Islands.
Note that the Sahara is huge and can be seen clearly both during day time and night time.
To the left, on top, is Greenland, totally frozen.