Astrophysics Data System

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SAO/NASA Astrophysics Data System

Producer	Smithsonian Astrophysical Observatory for the National Aeronautics and Space Administration (United States)
History	1992 to present
Access
Cost	Free
Coverage
Disciplines	Astronomy and physics
Record depth	Index & abstract & full-text
Geospatial coverage	Worldwide
Links
Website	ui.adsabs.harvard.edu

The SAO/NASA Astrophysics Data System (ADS) is a digital library portal for researchers on astronomy and physics, operated for NASA by the Smithsonian Astrophysical Observatory.^[1] ADS maintains three bibliographic collections containing over 20 million records, including all arXiv e-prints. Abstracts and full-text of major astronomy and physics publications are indexed and searchable through the portal.