Astronomy/Astrophysics: Best Free Resources: General
- About.com Astronomy Directory
- Astronomical Resources on the Internet (Univ. of Denver)
- AstroWeb Consortium (NRAO) - Data, people, publications, organizations, research
- CORE - COnnecting REpositories ( Knowledge Media institute, The Open University) - millions of scholarly articles aggregated from many Open Access repositories.
- Directory of Open Access Journals - Article Search (Lund Univ.) - Use the lower search box to access nearly 1 million OA articles in over 7,700 journals.
- Europeana - Multi-lingual online collection of millions of digitized items from European museums, libraries, archives and multi-media collections.
- NASA Home Page - Links to the space agency and more.
- OAIster - collection of digital open access/open archive documents (OCLC)
- Science.gov Gateway to authoritative selected science information provided by U.S. Government agencies, including research and development results
U.S. Dept. of Energy OSTI - Now the primary search engine for all DOE publications & resources. Replaces the National Library of Energy, SciTech Connect, PubScience, Energy Citation Database, & many other search interfaces. Maintained by the Office of Scientific and Technical Information.
- Virtual Astronomy, Astrophysics, and Space Reference Center - Martindale's Reference Desk
- WorldWideScience.org - Open access portal & federated search engine covering over 400 million pages from 65 countries. Papers can be translated into nine different languages.