For best results, click this link for accessible version

Astrophysics Data System

The Astrophysics Data System (ADS) consists of four searchable databases of abstracts of articles in astronomy and astrophysics, instrumentation, and physics and geophysics. Some full-text articles, as well as astronomy preprints, are available, including digitized historical astronomy and astrophysics literature.
Availability:
Available to everyone.
Creator:
NASA
Publisher:
Harvard-Smithsonian Center for Astrophysics