United States Naval Observatory
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| Address | 3450 Massachusetts Ave NW, Washington, DC 20392, United States |
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| Hours | Closed ⋅ Opens 9AM Tue |
| Phone | +1 202-762-1467 |
| Founded | 1830 |
| Date of Reg. | |
| Date of Upd. | |
| ID | 1400828 |
About United States Naval 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.
Where is the United States Naval Observatory
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