# Astrophysics Data System

> digital library portal for researchers in astronomy and physics, operated by the Smithsonian Astrophysical Observatory

**Wikidata**: [Q752099](https://www.wikidata.org/wiki/Q752099)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Astrophysics_Data_System)  
**Source**: https://4ort.xyz/entity/astrophysics-data-system


## References

1. [Open Access Directory](https://web.archive.org/web/20191117172926/http://oad.simmons.edu/oadwiki/Data_repositories)
2. Freebase Data Dumps. 2013