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The Library

The Library offers documentation and services to researchers and keeps historical collections from Paris Observatory.

Practical Information

Reference collections

Services for the public

Heritage collections

Presentation of the Library

Search all the catalogues of the Library (asynchronous update)
Catalog of printed books and journals
Electronic resources
Calames (archival collections)
Cosmos (museum collections)
Digital library


PSL resources


It is one of the most beautiful astronomical-astrophysical libraries in the world. The Library has two core missions: providing researchers with the most complete and relevant documentation and services, preserving and enhancing a 350-year-old heritage which still expands today.

Although the Library is mainly devoted to Paris Observatory scientists, it is also accessible to other audiences, mainly researchers in astronomy-astrophysics and historians.


Practical information

Documentary resources

Services for the public

Heritage collections

Presentation of the Library