The SAO/NASA Astrophysics Data System (ADS) is a digial library for researchers in physics and astronomy operated by the Smithsonian Astrophysical Observatory (SAO) under a NASA grant.

Refereed papers, published after launch, are included in the table below if they fulfil one or more of the following:

• Make direct use of data from a mission including from its primary catalogues
• Make quantitative predictions of results from a mission
• Describe a mission, its instruments, operations, software or calibrations

PhD theses are included in the table below if they include an analysis of data from the mission or describe hardware or software developed for the mission or its calibration. The completeness of the PhD libraries is difficult to estimate.

Last Update: 4 June 2018