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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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Estimative Products on Vietnam 1948-1975
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Estimative Products on Vietnam 1948-1975

Estimative Products on Vietnam 1948-1975

Reports of the United States Tax Court, V. 123, July 1, 2004 to December 31, 2004
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Reports of the United States Tax Court, V. 123, July 1, 2004 to December 31, 2004

Reports of the United States Tax Court, V. 123, July 1, 2004 to December 31, 2004

United States Congressional Serial Set, 108th Congress, Serial  No. 14829, House Documents No. 67-95
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United States Congressional Serial Set, 108th Congress, Serial No. 14829, House Documents No. 67-95

United States Congressional Serial Set, 108th Congress, Serial No. 14829, House Documents No. 67-95

Emergency Response to Terrorism: Job Aid
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Emergency Response to Terrorism: Job Aid

Emergency Response to Terrorism: Job Aid

Guns Along the Rio Grande: Palo Alto and Resaca de la Palma
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Guns Along the Rio Grande: Palo Alto and Resaca de la Palma

Guns Along the Rio Grande: Palo Alto and Resaca de la Palma

United States Congressional Serial Set, Serial No. 14831, House Documents No. 97-100, 108th Congress, 1st Session, January 7-December 8, 2003
Title:
United States Congressional Serial Set, Serial No. 14831, House Documents No. 97-100, 108th Congress, 1st Session, January 7-December 8, 2003

United States Congressional Serial Set, Serial No. 14831, House Documents No. 97-100, 108th Congress, 1st Session, January 7-December 8, 2003

Cannon Centenary Conference: The Changing Nature of the House Speakership, Cannon House Office Building, Wednesday, November 12, 2003
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Cannon Centenary Conference: The Changing Nature of the House Speakership, Cannon House Office Building, Wednesday, November 12, 2003

Cannon Centenary Conference: The Changing Nature of the House Speakership, Cannon House Office Building, Wednesday, November 12, 2003

United States Congressional Serial Set, Serial  No. 14799: Federal Law Enforcement at Borders and Port Activities, Challenges and Solutions
Title:
United States Congressional Serial Set, Serial No. 14799: Federal Law Enforcement at Borders and Port Activities, Challenges and Solutions

United States Congressional Serial Set, Serial No. 14799: Federal Law Enforcement at Borders and Port Activities, Challenges and Solutions

Report on the United States Intelligence Community's Prewar Intelligence Assessments on Iraq, July 9, 2004, Ordered Reported on July 7, 2004
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Report on the United States Intelligence Community's Prewar Intelligence Assessments on Iraq, July 9, 2004, Ordered Reported on July 7, 2004

Report on the United States Intelligence Community's Prewar Intelligence Assessments on Iraq, July 9, 2004, Ordered Reported on July 7, 2004

ORI: Introduction to the Responsible Conduct of Research
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ORI: Introduction to the Responsible Conduct of Research

ORI: Introduction to the Responsible Conduct of Research

Federal Guidelines for Dam Safety
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Federal Guidelines for Dam Safety

Federal Guidelines for Dam Safety

Operation Just Cause: The Incursion Into Panama
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Operation Just Cause: The Incursion Into Panama

Operation Just Cause: The Incursion Into Panama

Internal Revenue Bulletin, No. 2004-20, May 17, 2004
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Internal Revenue Bulletin, No. 2004-20, May 17, 2004

Internal Revenue Bulletin, No. 2004-20, May 17, 2004

Women in the Labor Force: A Databook
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Women in the Labor Force: A Databook

Women in the Labor Force: A Databook

Preservation Briefs 35-42: Recognizing and Resolving Common Preservation and Repair Problems Prior to Working on Historic Buildings
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Preservation Briefs 35-42: Recognizing and Resolving Common Preservation and Repair Problems Prior to Working on Historic Buildings

Preservation Briefs 35-42: Recognizing and Resolving Common Preservation and Repair Problems Prior to Working on Historic Buildings

United States Senate Catalogue of Fine Art
Title:
United States Senate Catalogue of Fine Art

United States Senate Catalogue of Fine Art

Sergeants Major of the Army (Paperbound Edition)
Title:
Sergeants Major of the Army (Paperbound Edition)

Sergeants Major of the Army (Paperbound Edition)

Transforming the Navy's Surface Combatant Force
Title:
Transforming the Navy's Surface Combatant Force

Transforming the Navy's Surface Combatant Force

Environmental Administrative Decisions: Decisions of the United States Environmental Protection Agency, V. 9, March 2000 to April 2001
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Environmental Administrative Decisions: Decisions of the United States Environmental Protection Agency, V. 9, March 2000 to April 2001

Environmental Administrative Decisions: Decisions of the United States Environmental Protection Agency, V. 9, March 2000 to April 2001

North Cascades: A Guide to the North Cascades National Park Service Complex, Washington
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North Cascades: A Guide to the North Cascades National Park Service Complex, Washington

North Cascades: A Guide to the North Cascades National Park Service Complex, Washington

Homeland Security Threat Level Signs (Poster)
Title:
Homeland Security Threat Level Signs (Poster)

Homeland Security Threat Level Signs (Poster)

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