Astronomy and Astrophysics

Contains a wide array of resources, including links to journal article indexes, full-text journals, conference proceedings, atlases, and preprint servers.

SciX is a digital library expansion to the ADS (Astrophysics Data System) database, as part of the NASA Open Source Science Initiative.
SciX supports open science principles, expanding access & accelerating scientific discovery for societal benefit.

Indexes journals and conference proceedings, primarily from physics, computer science, and electrical engineering. Also includes some physical chemistry (1969-present).

Includes online version of Science Citation Index. Indexes contents of over 3200 journals; also indexes references cited in the articles (1986-present).

Indexes over 1 million articles from about 80 journals covering all areas of physics and related disciplines (1975-present).