This Space Telescope Science Institute (Hubble Space Telescope) resource is a powerful educational tool that offers stunning content. The site is browser and graphic intensive. Explorations in Education provides electronic picture books featuring captioned images from HST. The picture books are available to be read in Mac, Windows, or screenshot versions. This site features a stand-alone Quicktime based electronic tutorial about using Cepheid variable stars to help measure the history of the universe, and several Adobe Acrobat (.pdf) papers relating to science and public policy.