We've already shown you how to set a rotating Earth image as your Linux wallpaper, and many of you came up with good Windows solutions to achieve the same effect. But if you're not the scripting type, here's a program that will do it all for you.
Desktop Earth is a small system tray utility that will automate the process of downloading snapshots of the Earth from NASA, complete with snow, cloud cover and a host of other configuration options. While the old method merely involved downloading one image over a specified interval, this program lets you choose whether you want cloud cover, which images you'd like to use for night and day, and where the image is centred. Best of all, despite the fact that it's a program running in the taskbar, it doesn't take up a lot of system resources, so there's not a big downside to using it. Whether you don't want to play around with scripting and the command line, or you'd just like the enhanced customisability of an app, Desktop Earth is another great way to get a cool moving wallpaper. Hit the link to check it out.