The James Melville Gilliss Library
The James Melville Gilliss Library located on the grounds of the United States Naval Observatory is one of the preeminent scientific libraries in the United States.
July 2014 Library display
Got a question regarding the USNO Library collection? Ask the USNO Librarian!
Search the holdings of the James M. Gilliss library via our online catalog - URANIA.
Search the SAO/NASA Astrophysical Data System (ADS)
Recently Cataloged Books, Electronic Journals, and Publications of the USNO and its staff
A sampling of the historical photos, artwork and objects contained within the library.
Learn more about the history of the library
Links to additional online resources