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The USNO websites aa.usno.navy.mil, ad.usno.navy.mil, aristarchus.usno.navy.mil, maia.usno.navy.mil, rorf.usno.navy.mil, toshi.usno.navy.mil, and tycho.usno.navy.mil are undergoing modernization efforts. The expected completion of the work and the estimated return of service is Fall 2020, subject to change due to potential impacts of COVID-19.
 

Tour Information for USNO Washington DC

Updated 2017 October 16

Public tours of the U.S. Naval Observatory in Washington, DC, have been suspended until further notice.


CURRENT TOUR STATUS

Due to issues beyond our control all public tours have been suspended until further notice.  Please refer to this page to check to see when/if the tours are resumed.  We apologize for this circumstance.