Welcome to Urania

Serving the United States Naval Observatory for over 150 years, the USNO Library's collection has long been considered one of the country's finest in astronomy and navigation. Search here to discover books, journals, archival materials, and 3D objects in our Library stacks. To find a specific record, simply type keywords into the search box below and click the ‘search’ button.

To perform truncated searches, use the * character. For example, comput* will bring up records with the words ‘computing’, ‘computer’, ‘computation’, etc.

To access additional search options, use the Advanced Search tab, or check out defined collections using the Collection highlights tab.

3450 Massachusetts Avenue NW, Building 1 -- Library, Washington, DC 20392
Open by appointment: Monday-Friday, 0930 - 1730
(202) 762 1463 / Email

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