Encyclopedia of Astronomy & Astrophysics: Covers astronomy and astrophysics and includes reference articles and links to primary literature
Oxford Reference Online- Physical Sciences & Mathematics: Collection contains reference works covering Astronomy, Chemistry, Cosmology, Mathematics, Physics, Scientists, Space Exploration, Statistics, Weights, Measures, and Units.
Smithsonian/NASA Astrophysics Data System: Article Linker does not work with this database. Use the Penrose Library Catalog to find journal and full-text information.
Web of Science (Science Citation Index): Allows searching the journal literature in all branches of the sciences not only by subject or author, but also by cited author or article. 1955-