A NASA-funded project that provides abstracts and/or citations to journals in fields that includes: astronomy, astrophysics, containing 524,304 abstracts, instrumentation, physics, geophysics, and the Los Alamos preprint server. Some full-text.
Google Scholar
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Search for scholarly literature, including peer-reviewed papers, theses, books, preprints, abstracts and technical reports in all disciplines. Linked to Tripod.
Web of Science
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Find multidisciplinary scholarly articles (sciences, social sciences, and humanities). Citation searching also allows search for highly cited articles and books.
NASA is using PMC to permanently preserve and provide easy public access to the peer-reviewed papers resulting from NASA-funded research.
Annual Review of Astronomy and Astrophysics
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The Annual Review of Astronomy and Astrophysics, in publication since 1963, covers the significant developments in the field of Astronomy and Astrophysics, including: the sun; solar system and extrasolar planets; stars; the interstellar medium; galaxy and galaxies; active galactic nuclei; cosmology; and instrumentation and techniques, andthe history of the development of new areas of research.