NASA Astrophysics Data System

Description Astrophysics Data System (ADS) is a NASA-funded project which maintains four bibliographic databases: Astronomy and Astrophysics, Instrumentation, Physics and Geophysics, and preprints in Astronomy. The main body of data in the ADS consists of bibliographic records, and full-text scans of much of the astronomical literature.
Subjects Astronomy
Subscription Free
Alumni Access No