This program is designed to offer you a wide range of wallpaper options and a simple way to change the appearance of your desktop. The offered photos are from the NASA Astronomy Pictures of the Day public domain and portrait meteors, comets, planets, and plenty of impressive space landscapes.
Cosmo Desktop is an app that comes in handy whenever you get tired of your old wallpapers and wish to personalize your desktop with stunning astronomy themes. Once you launch the app you will have access to a comprehensive amount of pictures which you can preview before changing the appearance of your desktop.
All you need to do in order to enable a wallpaper is to click over the one you prefer and the app automatically makes the necessary change. The program also gives you direct access to the NASA Astronomy Pictures of the Day public domain where you can find detailed info regarding each of the available themes.
Still, the app brings several disadvantages: it doesn't provide you with an option to save the wallpapers to your PC, lacks an integrated search tool, and might take a while to load the themes list.
But since the program comes free of charge and offers such an impressive collection of screen backgrounds, I say it's worth a try.