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The United States Naval Observatory performs an essential scientific role for the United States, the Navy, and the Department of Defense. Its mission includes determining the positions and motions of the Earth, Sun, Moon, planets, stars and other celestial objects; providing astronomical data; determining precise time; measuring the Earth's rotation; and maintaining the Master Clock for the United States. Observatory astronomers formulate the theories and conduct the relevant research necessary to improve these mission goals. This astronomical and timing data, essential for accurate navigation and the support of communications on Earth and in Space, is vital to the Navy and Department of Defense. It is also used extensively by other agencies of the government, industry and the public at large.

The Observatory consists of four Scientific Departments: Astrometry, Astronomical Applications, Earth Orientation, and Time Service. Each Department is responsible for specific products and services tailored to their end-users within both the DoD and civilian worlds.

The Naval Observatory's Nautical Almanac Office computes and prepares the vital annual U.S. navigational publications, the Air Almanac and the Nautical Almanac. In addition, they carry on the essential research work of deriving improved values of the fundamental astronomical elements and embodying them in new tables of the celestial motions, publishing the Astronomical Phenomena and the Astronomical Almanac. These publications are produced in cooperation with Her Majesty's Nautical Almanac Office, United Kingdom Hydrographic Office.

To learn more about the U.S. Naval Observatory, visit their website.

The bound volumes of the United States Reports contain the fourth and final generation of the Supreme Court's opinions.

Caution: Only the printed bound volumes of the United States Reports contain the final, official opinions of the Supreme Court of the United States. In case of discrepancies between a bound volume and any other version of the same materials, whether print or electronic, official or unofficial--the printed bound volume controls in a court of law.

In this official collection, you will find several published bound volumes of the United States Statutes at Large. These volumes contain the evidence of law enacted by the specific session of the U.S. Congress.  Included are full-text of public laws, plus congressional resolutions and presidential proclamations within each Congressional session stated. Each volume also contains a broad array of topics as it applies to the specific Congressional member terms and official legislation. These volumes serve as official legal references of the U.S. Congress.

 

Explore these Government publications highlighting U.S. and military history. Military topics cover major wars and battles, as well as the history on all branches of the military. For anyone interested in America’s history, key publications cover information on American democracy, presidents, presidential elections, and other important topics.

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Senate Manual, 2001
Title:
Senate Manual, 2001

Senate Manual, 2001

Cultural Landscape Report: Dumbarton Oaks Park, Rock Creek Park,  Pt. 1: Site History, Existing Conditions and Analysis and Evaluation
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Cultural Landscape Report: Dumbarton Oaks Park, Rock Creek Park, Pt. 1: Site History, Existing Conditions and Analysis and Evaluation

Cultural Landscape Report: Dumbarton Oaks Park, Rock Creek Park, Pt. 1: Site History, Existing Conditions and Analysis and Evaluation

Public Papers of the Presidents of the United States: William J. Clinton, 1999, Book 1, January 1 to June 30, 1999
Title:
Public Papers of the Presidents of the United States: William J. Clinton, 1999, Book 1, January 1 to June 30, 1999

Public Papers of the Presidents of the United States: William J. Clinton, 1999, Book 1, January 1 to June 30, 1999

Omaha Beachhead (6 June-13 June 1944)
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Omaha Beachhead (6 June-13 June 1944)

Omaha Beachhead (6 June-13 June 1944)

Making Educated Decisions 2: A Landscape Preservation Bibliography
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Making Educated Decisions 2: A Landscape Preservation Bibliography

Making Educated Decisions 2: A Landscape Preservation Bibliography

United States Army in World War 2, Technical Services, Transportation Corps, Movements, Training, and Supply (Clothbound)
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United States Army in World War 2, Technical Services, Transportation Corps, Movements, Training, and Supply (Clothbound)

United States Army in World War 2, Technical Services, Transportation Corps, Movements, Training, and Supply (Clothbound)

United States Army in World War 2: The Quartermaster Corps, Operations in War Against Japan (Hardcover)
Title:
United States Army in World War 2: The Quartermaster Corps, Operations in War Against Japan (Hardcover)

United States Army in World War 2: The Quartermaster Corps, Operations in War Against Japan (Hardcover)

Combat Operations: Stemming the Tide, May 1965 to October 1966 (Paperback)
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Combat Operations: Stemming the Tide, May 1965 to October 1966 (Paperback)

Combat Operations: Stemming the Tide, May 1965 to October 1966 (Paperback)

Pocket Guide to Staying Healthy at 50+
Title:
Pocket Guide to Staying Healthy at 50+

Pocket Guide to Staying Healthy at 50+

High-Earning Workers Who Don't Have A Bachelor's Degree
Title:
High-Earning Workers Who Don't Have A Bachelor's Degree

High-Earning Workers Who Don't Have A Bachelor's Degree

Public Papers of the Presidents of the United States, William J. Clinton, 1997, Book 2, July 1 to December 31, 1997
Title:
Public Papers of the Presidents of the United States, William J. Clinton, 1997, Book 2, July 1 to December 31, 1997

Public Papers of the Presidents of the United States, William J. Clinton, 1997, Book 2, July 1 to December 31, 1997

Location Identifiers, 7350.7
Title:
Location Identifiers, 7350.7

Location Identifiers, 7350.7

Eye for History: The Paintings of William Henry Jackson, From the Collection at the Oregon Trail Museum
Title:
Eye for History: The Paintings of William Henry Jackson, From the Collection at the Oregon Trail Museum

Eye for History: The Paintings of William Henry Jackson, From the Collection at the Oregon Trail Museum

Public Papers of the Presidents of the United States, Dwight D. Eisenhower, 1959: Containing the Public Messages, Speeches, and Statements of the President, January 1 to December 31, 1959
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Public Papers of the Presidents of the United States, Dwight D. Eisenhower, 1959: Containing the Public Messages, Speeches, and Statements of the President, January 1 to December 31, 1959

Public Papers of the Presidents of the United States, Dwight D. Eisenhower, 1959: Containing the Public Messages, Speeches, and Statements of the President, January 1 to December 31, 1959

Public Papers of the Presidents of the United States, Dwight D. Eisenhower, 1957: Containing the Public Messages, Speeches, and Statements of the President, January 1 to December 31, 1957
Title:
Public Papers of the Presidents of the United States, Dwight D. Eisenhower, 1957: Containing the Public Messages, Speeches, and Statements of the President, January 1 to December 31, 1957

Public Papers of the Presidents of the United States, Dwight D. Eisenhower, 1957: Containing the Public Messages, Speeches, and Statements of the President, January 1 to December 31, 1957

Public Papers of the Presidents of the United States, Harry S. Truman, 1952-53: Containing the Public Messages, Speeches, and Statements of the President, January 1, 1952 to January 20, 1953
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Public Papers of the Presidents of the United States, Harry S. Truman, 1952-53: Containing the Public Messages, Speeches, and Statements of the President, January 1, 1952 to January 20, 1953

Public Papers of the Presidents of the United States, Harry S. Truman, 1952-53: Containing the Public Messages, Speeches, and Statements of the President, January 1, 1952 to January 20, 1953

Public Papers of the Presidents of the United States, Harry S. Truman, 1951: Containing the Public Messages, Speeches, and Statements of the President, January 1 to December 31, 1951
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Public Papers of the Presidents of the United States, Harry S. Truman, 1951: Containing the Public Messages, Speeches, and Statements of the President, January 1 to December 31, 1951

Public Papers of the Presidents of the United States, Harry S. Truman, 1951: Containing the Public Messages, Speeches, and Statements of the President, January 1 to December 31, 1951

Public Papers of the Presidents of the United States, Harry S. Truman, 1949: Containing the Public Messages, Speeches, and Statements of the President, January 1 to December 31, 1949
Title:
Public Papers of the Presidents of the United States, Harry S. Truman, 1949: Containing the Public Messages, Speeches, and Statements of the President, January 1 to December 31, 1949

Public Papers of the Presidents of the United States, Harry S. Truman, 1949: Containing the Public Messages, Speeches, and Statements of the President, January 1 to December 31, 1949

Public Papers of the Presidents of the United States, Dwight D. Eisenhower, 1960-61: Containing the Public Messages, Speeches, and Statements of the President, January 1, 1960 to January 20, 1961
Title:
Public Papers of the Presidents of the United States, Dwight D. Eisenhower, 1960-61: Containing the Public Messages, Speeches, and Statements of the President, January 1, 1960 to January 20, 1961

Public Papers of the Presidents of the United States, Dwight D. Eisenhower, 1960-61: Containing the Public Messages, Speeches, and Statements of the President, January 1, 1960 to January 20, 1961

Public Papers of the Presidents of the United States, William J. Clinton, 1997, Book 1, January 1 to June 30, 1997
Title:
Public Papers of the Presidents of the United States, William J. Clinton, 1997, Book 1, January 1 to June 30, 1997

Public Papers of the Presidents of the United States, William J. Clinton, 1997, Book 1, January 1 to June 30, 1997

United States Army in World War 2, Technical Services, Corps of Engineers, The War Against Japan (Hardcover)
Title:
United States Army in World War 2, Technical Services, Corps of Engineers, The War Against Japan (Hardcover)

United States Army in World War 2, Technical Services, Corps of Engineers, The War Against Japan (Hardcover)

Air Force Roles and Missions: A History
Title:
Air Force Roles and Missions: A History

Air Force Roles and Missions: A History

Military Intelligence (Cloth Edition)
Title:
Military Intelligence (Cloth Edition)

Military Intelligence (Cloth Edition)

Jefferson Memorial: Interpretive Guide to Thomas Jefferson Memorial, District of Columbia
Title:
Jefferson Memorial: Interpretive Guide to Thomas Jefferson Memorial, District of Columbia

Jefferson Memorial: Interpretive Guide to Thomas Jefferson Memorial, District of Columbia

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