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U.S. Naval Observatory Library

Address: 3450 Massachusetts Ave. NW
Washington, DC 20392

When: August 11, 10 a.m. Allow for extra time in advance of the tour because of security checks entering the grounds. 

Details: Tour; 25 people per group; pre-registration required

About: The James M. Gilliss library staff will host a tour of its reading room and a visit to a telescope. The library is the largest astronomy library in the United States.

Contact: Sally Bosken, www.usno.navy.mil/USNO/library

Comments:
2
2 Comment(s) to the "U.S. Naval Observatory Library"
Radmila says:
Good

The USNO Library is a highly specialized repository that combines historical significance with practical scientific support, serving both as a research hub and a custodian of centuries of astronomical knowledge. My99 Exch Black 

Submitted by Radmila on June 4, 2026 - 2:42am.
117108 says:
Good

The guided experience, including access to the reading room and a telescope visit, makes it even more engaging and educational. Cricplus Pro

Submitted by 117108 on March 23, 2026 - 2:10am.