Astronomy, Oceanography, and Precision Timekeeping

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NEW Date and Time: Monday, May 8, 2017 from 8:00 pm to 10:30 pm.  Space limited!

Astronomy, Oceanography, and Precision Timekeeping

Join us on an exciting tour to the US Naval Observatory on Monday, May 8, 2017 from 8:00 pm to 10:30 pm for FREE!  This tour is limited to Harvard Club members and their guests.

The tour will include a presentation of the Mission and History of the Naval Observatory, a description of USNO's timekeeping responsibilities with a presentation on the history of precision timekeeping, and (weather permitting) viewing of celestial objects through the historic 1895-vintage 12-inch Alvan Clark refractor telescope with an astronomer.  USNO serves as the official source of time for the U.S. Department of Defense and a standard of time for the entire United States.

Considerable walking on hilly ground in darkness during the tour--please consider this important safety precaution before registering. Members are urged to wear shoes with more treads to prevent slipping/fall. Many of the buildings do not have easy access for wheelchairs, strollers, etc.

Only up to 20 spaces are allowed per group.  The current tour date of May 8, 2017 is confirmed and we have been notified that we must arrive at 8:00 pm.  We must provide the names and dates-of-birth of all individuals in the group to the USNO.

RSVP by February 19 by following the steps below:

  1. Click here to RSVP  
  2.  Email our Executive Director, Caren Pauley (, or call her at 202-337-1300 to provide your date of birth.  Due to privacy reasons, we do not collect or store personal information in our event registration system.

Any questions, please contact Ilin (

Location: 3450 Massachusetts Ave NW, Washington, DC 20392.  Note:  Everyone should enter through the South Gate at 37 Observatory Circle, NW, Washington, DC (near New Zealand Embassy).


1) Nearest Metro: Woodley Park-Zoo station, ~1.3 miles to the Observatory by foot. 

2) Parking: street parking.

Security: USNO is a military installation, all adult visitors will be required to present a valid government-issued photo ID (Passport, Driver's License, etc.).  Punctuality is a MUST!  Visitors who arrive after 8:20 pm will not be admitted.

When: Monday, 05/08/17 at 8:00pm - 10:30pm | iCal


The US Naval Observatory
3450 Massachusetts Ave., NW
Washington, DC 20392



Monday, 05/8/17 at 8:00pm - 10:30pm | iCal


The US Naval Observatory
3450 Massachusetts Ave., NW
Washington, DC 20392

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