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Its a small windows utility which generates wallpaper dynamically with an accurate wallpaper showing how day and nigh changes on earth. You would feel like watching it from space. You can even see clouds, snow and night visions. It takes time from your computer and creates the wallpaper.
You can also get the cloud updates every few hours. This makes it really look alive all the time. If you had wished seeing the earth from space this can satisfy you for a long time. However if you wish to setup time zones, cloud settings and others manually it provides full options for it. Download Desktopearth setup