To download a wallpaper, simply select the resolution you prefer. (Some operating systems require you to right-click or click-and-hold to save the file to your hard drive.) Then simply set up the desktop as you normally would, for example with the Control Panels or System Preferences, depending on your computer. (On some platforms you will have the option to automatically set the picture as your desktop when you download it; if you have this option it is the easiest way to set it up.) Check back often, as we will update the choices available as Spitzer continues to make discoveries in outer space.