On the canvas window, go to Filters -> Noise -> Hurl. Under Advanced Options, choose Fill With: Foreground Color (black). At the minimum, you will want your image size to be your desktop resolution, such as 1024×768 or 1440×900. We will, of course, want to start with a layer of stars. If you do not already have Gimp (available by default in current Ubuntu versions) it’s freely available for download here for Windows, Linux, and Mac. In this guide we’ll cover a 10 minute method to creating a galactic landscape that may not win you any awards but will certainly add some depth to your desktop. Creating a cool space scene can be done in a few minutes once you’ve got the basic method down, and Gimp provides several ways to go about adding random elements to keep things interesting. I’m a sucker for a cool space wallpaper, and judging by the images I find online, so are many of you.