Hubble Telescope Screensaver - Version 1.1 The Hubble Telescope Screensaver shows spectacular and breathtaking images of stars, nebulae, galaxies and planets. Each image was taken by NASA's Hubble Space Telescope. The screensaver also comes with a free Screen Saver Control that resides in the Windows system tray. This control makes it easy to activate any screensaver installed on your computer, to change the default screensaver, to access the screensaver settings, and to randomly launch a new screensaver at regular intervals or when Windows restarts. Includes 30 images.