Public tours of the United States Naval Observatory (USNO) tours are offered on selected Monday evenings from 8:30 PM to 10:00 PM.

These tours include a presentation of the Mission and History of the Naval Observatory, a look into the USNO’s timekeeping responsibilities and a viewing of celestial objects with a 12-inch Alvan Clark refractor.

Please visit their website to request a tour. An individual can request a tour for up to 20 people; full names and birthdates are required in order to request a tour.