Space Journey 4 screensaver images transport you on a space voyage to each of our planets and their major moons. Featuring 50 elegant, colorful and truly beautiful images of the planets and their satellites selected from the NASA image archives. From Mercury to Pluto, from our moon to Io and the other larger moons in our solar system, enjoy their graceful beauty from a perspective not usually seen by man.  8 mb of images, all of which can be saved with 1 click as your desktop background from the control panel. User can customize features including image size and location, caption location and color or no caption displayed, background color, transition effects, image display time and more.