The vice pres.........lives there...........

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United States Naval Observatory  
Astronomical Observatory
The United States Naval Observatory is one of the oldest scientific agencies in the United States, with a primary mission to produce Positioning, Navigation and Timing for the United States Navy and the United States Department of Defense. Wikipedia
Address: 3450 Massachusetts Ave NW, Washington, DC 20392
Phone: (202) 762-1467
Hours: 
Closed today · Hours