Free Access
Astron. Astrophys. Suppl. Ser.
Volume 143, Number 1, April I 2000
The CDS and NASA ADS Resources: New Tools for Astronomical Research
Page(s) 61 - 83
Published online 15 April 2000
DOI: 10.1051/aas:2000171

Astron. Astrophys. Suppl. Ser. 143, 61-83

The NASA Astrophysics Data System: The search engine and its user interface

Guenther Eichhorn - Michael J. Kurtz - Alberto Accomazzi - Carolyn S. Grant - Stephen S. Murray

Send offprint request: G. Eichhorn,

Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, U.S.A.

Received August 30; accepted September 3, 1999


The ADS Abstract and Article Services provide access to the astronomical literature through the World Wide Web (WWW). The forms based user interface provides access to sophisticated searching capabilities that allow our users to find references in the fields of Astronomy, Physics/Geophysics, and astronomical Instrumentation and Engineering. The returned information includes links to other on-line information sources, creating an extensive astronomical digital library. Other interfaces to the ADS databases provide direct access to the ADS data to allow developers of other data systems to integrate our data into their system.

The search engine is a custom-built software system that is specifically tailored to search astronomical references. It includes an extensive synonym list that contains discipline specific knowledge about search term equivalences.

Search request logs show the usage pattern of the various search system capabilities. Access logs show the world-wide distribution of ADS users.

The ADS can be accessed at:

Key words: methods: data analysis -- databases: misc -- publications, bibliography

Copyright The European Southern Observatory (ESO)

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.