I was flying from Berlin to Rome when I saw a similar skyscape... so I decided to recreate it with my computer!
Created with Terragen 2 at 3200x2000 in about 8 hours!
The RAR file contains the following sizes of the image:
Full Screen 5:4
Full Screen 4:3
Wide Screen 16:10
High Definition 16:9
1920x1080 (HDTV 1080p)
1280x720 (HDTV 720p)