P. Langley was also a major impetus to make telescopes..............to observe the stars.........this is in nw dc.............and where the vice pres. lives..........

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   United States Naval Observatory  

   Astronomical Observatory
3. 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
5. Address: 3450 Massachusetts Ave NW, Washington, DC 20392
7. Phone: (202) 762-1467
8. Hours: 

   Closed today · Hours