Cosmic Clearinghouse serves as an educational clearing house for the best astronomy outreach resources, activities, images, materials, guides, facilities and events for a variety of target audiences from the casual enthusiast to the professional educator. Sections suitable for teachers, museum educators, amateur astronomers, after-school providers, family program leaders, and other groups will be included, with links to existing useful sites as well as directories of materials and information in areas in which resources are currently needed. The site will be developed for sustainability beyond 2009, as a permanent resource for anyone interested in astronomy, space science, education and outreach.