Here are some of the principal information resources in astronomy and astrophysics.
Astronomy and Astrophysics
Publication coverage: 1991 - present (updated daily)The arXiv database contains e-prints (working papers) in the fields of astrophysics, physics, mathematics and statistics, non-linear science, computer science, quantitative biology, quantitative finance, economics, and electrical engineering.
Publication coverage: Science Citation Index: 1900 - present ; Social Sciences Citation Index: 1956 - present ; Arts and Humanities: 1975 - presentA large, multidisciplinary database, Web of Science provides access to bibliographic information, author abstracts, and cited references from scholarly journals and conference proceedings. A cited reference search enables you to find articles that cite a previously published work.