The United States Naval Observatory (USNO) is a scientific and military facility that produces geopositioning, navigation and timekeeping data for the...

The United States Naval Observatory Flagstaff Station (NOFS), is an astronomical observatory near Flagstaff, Arizona, US. It is the national dark-sky observing...

The Old Naval Observatory is a historic site at 23rd and E Street in Northwest, Washington, D.C. It is where the United States Naval Observatory was located...

2011. Retrieved 26 January 2013. "Astronomy and Astrophysics (United States Naval Observatory)". Heritage Preservation Services, National Park Service. 2001-11-05...

Sound Naval Shipyard Naval Air Station Whidbey Island Naval Magazine Indian Island Jim Creek Naval Radio Station United States Naval Observatory Naval Support...

(NIST) (an agency of the Department of Commerce); and the United States Naval Observatory (USNO). The clocks run by these services are kept synchronized...

the United States Congress passed the Naval Act of 1794 for the construction of six heavy frigates, the first ships of the Navy. The United States Navy...

structure of the United States Navy consists of four main bodies: the Office of the Secretary of the Navy, the Office of the Chief of Naval Operations, the...

1978 at the United States Naval Observatory in Washington, D.C., using photographic plates taken at the United States Naval Observatory Flagstaff Station...

HM Nautical Almanac Office, in the United Kingdom The Nautical Almanac Office, at the United States Naval Observatory NAO (disambiguation) This disambiguation...

The chief of naval operations (CNO) is the highest-ranking officer of the United States Navy. The position is a statutory office (10 U.S.C. § 8033) held...

Number One Observatory Circle, often referred to as the Naval Observatory, is the official residence of the vice president of the United States. Located...

mile north of Georgetown and just west of the United States Naval Observatory and Number One Observatory Circle (the Vice President's mansion). Every morning...

Almanac Office and the United States Naval Observatory. 2021. "Leap Seconds". Time Service Department, United States Naval Observatory. 1999. Archived from...

compared the clocks in motion to stationary clocks at the United States Naval Observatory. When reunited, the three sets of clocks were found to disagree...

United States Naval Observatory following orders from Superintendent Matthew Fontaine Maury. Sears C. Walker was fired by Maury for publishing United...

Astronomical Almanac Online. HM Nautical Almanac Office and United States Naval Observatory. 2012. Archived from the original on 2013-06-15. Retrieved...

UK. and promoted worldwide by Gernot M. R. Winkler of the United States Naval Observatory. Caesium atomic clocks are one of the most accurate time and...

Solstice d’hiver "Equinoxes". Astronomical Information Center. United States Naval Observatory. 14 June 2019. Archived from the original on 21 August 2019...

from the original on 25 June 2022. Retrieved 18 June 2022. United States Naval Observatory. "Universal Time". Archived from the original on 22 July 2011...

35th street, bounded by Scott Circle to the south and the United States Naval Observatory to the north; the term is often applied to nearby streets and...

Lowell Observatory is an astronomical observatory in Flagstaff, Arizona, United States. Lowell Observatory was established in 1894, placing it among the...

Kenneth J. Johnston. The NPOI project was initiated by the United States Naval Observatory (USNO) in 1987. Lowell joined the project the following year...

Dennis D. McCarthy is a former Director of Time at the United States Naval Observatory. McCarthy also works for the International Earth Rotation and Reference...

ambiguity[clarification needed], whereas the Nautical Almanac Office at the United States Naval Observatory used GMT for the pre-1925 convention and Greenwich Civil Time...

at the Wayback Machine. (10 August 2017). United States Naval Observatory. United States Naval Observatory (14 June 2011), Leap Years, archived from the...

including the index. In 1940, Eckert became director of the United States Naval Observatory in Washington, D.C. World War II had been raging in Europe...

the Royal Greenwich Observatory and to establish a time scale, called Greenwich Atomic (GA). The United States Naval Observatory began the A.1 scale on...

earlier or later depending on where it is in its orbit. The United States Naval Observatory states "the Equation of Time is the difference apparent solar time...

Method". United States Naval Observatory. Retrieved 12 September 2008. "Sequential Designation Method". United States Naval Observatory. Retrieved 12 September...