K-12 and Educational Outreach AstroEd , a K12 educational outreach program at the University of Washington maintained by Alan Cairns. The National Optical Astronomy Observatories K-12 educational outreach page. The Space Telescope Science Institute educational activities page. Professor Karen Meech of the University of Hawaii's Institute for Astronomy has an extensive collection to astronomy education resources. There are many excellent sites around the WWW that concentrate in solar system objects.
New sites appear almost daily.
Views of the Solar System by Calvin Hamilton of Los Alamos National Laboratory. The Nine Planets by Bill Arnett. Sources of Astronomical Images and Information Yahoo's Astronomy Links. An extensive collection of links covering almost all aspects of astronomy. Updated frequently so that it makes a good starting place for searches.