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

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117108 says:
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The guided experience, including access to the reading room and a telescope visit, makes it even more engaging and educational. Cricplus Pro