The free screensaver, Luna, was created by RateMyScreensaver.com and contains 19 high resolution images of the Moon. The Moon is Earth's only natural satellite. It has no formal English name other than the Moon, although it is occasionally called Luna (Latin for moon) to distinguish it from the generic term moon (referring to any of the various natural satellites of other planets).- wiki Screensaver Picture Count: 19 Screensaver Type: Slideshow Credit: All images in this screensaver provided by NASA and the ESA