Astrophysics Data System

Digital library portal operated by the Smithsonian SAO/NASA Astrophysics Data SystemProducerSmithsonian Astrophysical Observatory for the National Aeronautics and Space Administration (United States)History1992 to presentAccessCostFreeCoverageDisciplinesAstronomy and physicsRecord depthIndex & abstract & full-textGeospatial coverageWorldwideLinksWebsiteui.adsabs.harvard.eduscixplorer.org 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. ADS maintains three bibliographic collections containing over 15 million records, including all arXiv e-prints. Abstracts and full-text of major astronomy and physics publications are indexed and searchable through the portal. Historical context Johann Friedrich Weidler published the first comprehensive history of astronomy in 1741 and the first astronomical bibliography in 1755. This was an effort to archive and classify earlier astronomical knowledge and works. This effort was continued by Jérôme de La Lande who published his Bibliographie astronomique in 1803, a work that covered the period from 480 BCE to the year of