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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.

Are you looking for information about the United States Statutes at Large?  

In this official collection, you will find several published bound volumes of the United States Statutes at Large.  These volumes contain the evidenec 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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Psychosocial Issues for Children and Adolescents in Disasters
Title:
Psychosocial Issues for Children and Adolescents in Disasters

Psychosocial Issues for Children and Adolescents in Disasters

United States Congressional Serial Set, Serial No. 14682, Senate Document No. 4, Report of Secretary of Senate, Oct. 1, 2000-Narch 31, 2001, Pt. 1
Title:
United States Congressional Serial Set, Serial No. 14682, Senate Document No. 4, Report of Secretary of Senate, Oct. 1, 2000-Narch 31, 2001, Pt. 1

United States Congressional Serial Set, Serial No. 14682, Senate Document No. 4, Report of Secretary of Senate, Oct. 1, 2000-Narch 31, 2001, Pt. 1

United States Congressional Serial Set, Serial No. 14708, House Document No. 67, Statement of Disbursements of House, Jan. 1-March 31, 2001. Pt. 2
Title:
United States Congressional Serial Set, Serial No. 14708, House Document No. 67, Statement of Disbursements of House, Jan. 1-March 31, 2001. Pt. 2

United States Congressional Serial Set, Serial No. 14708, House Document No. 67, Statement of Disbursements of House, Jan. 1-March 31, 2001. Pt. 2

Biographical Directory of the United States Congress, 1774-2005
Title:
Biographical Directory of the United States Congress, 1774-2005

Biographical Directory of the United States Congress, 1774-2005

Constitution, Jefferson's Manual, and Rules of the House of Representatives of the United States, One Hundred Ninth Congress
Title:
Constitution, Jefferson's Manual, and Rules of the House of Representatives of the United States, One Hundred Ninth Congress

Constitution, Jefferson's Manual, and Rules of the House of Representatives of the United States, One Hundred Ninth Congress

United States Congressional Serial Set, Serial No. 14683, Senate Document No. 4, Report of Secretary of Senate, Oct. 1, 2000-March 31, 2001, Pt. 2
Title:
United States Congressional Serial Set, Serial No. 14683, Senate Document No. 4, Report of Secretary of Senate, Oct. 1, 2000-March 31, 2001, Pt. 2

United States Congressional Serial Set, Serial No. 14683, Senate Document No. 4, Report of Secretary of Senate, Oct. 1, 2000-March 31, 2001, Pt. 2

Monocacy National Battlefield: Cultural Resources Study
Title:
Monocacy National Battlefield: Cultural Resources Study

Monocacy National Battlefield: Cultural Resources Study

United States Army and World War II: Set 4 of 7, The Technical Services, Pt. 1 (Chemical, Ordnance, Transportation, and Signal) (CD-ROM)
Title:
United States Army and World War II: Set 4 of 7, The Technical Services, Pt. 1 (Chemical, Ordnance, Transportation, and Signal) (CD-ROM)

United States Army and World War II: Set 4 of 7, The Technical Services, Pt. 1 (Chemical, Ordnance, Transportation, and Signal) (CD-ROM)

United States Army and World War II: Set 5 of 7, The Technical Services, Pt. 2 (Corps of Engineers, Quartermaster, and Medical) (CD-ROM)
Title:
United States Army and World War II: Set 5 of 7, The Technical Services, Pt. 2 (Corps of Engineers, Quartermaster, and Medical) (CD-ROM)

United States Army and World War II: Set 5 of 7, The Technical Services, Pt. 2 (Corps of Engineers, Quartermaster, and Medical) (CD-ROM)

Invasive Plants of Alaska
Title:
Invasive Plants of Alaska

Invasive Plants of Alaska

NIOSH Pocket Guide to Chemical Hazards (Book)
Title:
NIOSH Pocket Guide to Chemical Hazards (Book)

NIOSH Pocket Guide to Chemical Hazards (Book)

Senate Document
Title:
Senate Document

Senate Document

Report to the Congress of the United States: A Review of the Restrictions on Persons of Italian Ancestry During World War II
Title:
Report to the Congress of the United States: A Review of the Restrictions on Persons of Italian Ancestry During World War II

Report to the Congress of the United States: A Review of the Restrictions on Persons of Italian Ancestry During World War II

Options for Strategic Military Transportation Systems
Title:
Options for Strategic Military Transportation Systems

Options for Strategic Military Transportation Systems

Official Congressional Directory, 2005-2006, 109th Congress, Convened January 4, 2005 (Clothbound)
Title:
Official Congressional Directory, 2005-2006, 109th Congress, Convened January 4, 2005 (Clothbound)

Official Congressional Directory, 2005-2006, 109th Congress, Convened January 4, 2005 (Clothbound)

Directors of the Central Intelligence as Leaders of the United States Intelligence Community, 1946-2005
Title:
Directors of the Central Intelligence as Leaders of the United States Intelligence Community, 1946-2005

Directors of the Central Intelligence as Leaders of the United States Intelligence Community, 1946-2005

Official Congressional Directory, 2005-2006, 109th Congress, Convened January 4, 2005 (Paperbound)
Title:
Official Congressional Directory, 2005-2006, 109th Congress, Convened January 4, 2005 (Paperbound)

Official Congressional Directory, 2005-2006, 109th Congress, Convened January 4, 2005 (Paperbound)

Air Force Civil Engineer
Title:
Air Force Civil Engineer

Air Force Civil Engineer

Constitution of the United States of America: Analysis and Interpretation
Title:
Constitution of the United States of America: Analysis and Interpretation

Constitution of the United States of America: Analysis and Interpretation

United States Congressional Serial Set, Serial No. 14866, Senate Document
Title:
United States Congressional Serial Set, Serial No. 14866, Senate Document

United States Congressional Serial Set, Serial No. 14866, Senate Document

Committee on Appropriations, United States Senate: 138th Anniversary, 1867-2005
Title:
Committee on Appropriations, United States Senate: 138th Anniversary, 1867-2005

Committee on Appropriations, United States Senate: 138th Anniversary, 1867-2005

The Constitution of the United States of America: Analysis and Interpretation, 2004 Supplement, Analysis of Cases Decided by the Supreme Court of the United States to June 29, 2004
Title:
The Constitution of the United States of America: Analysis and Interpretation, 2004 Supplement, Analysis of Cases Decided by the Supreme Court of the United States to June 29, 2004

The Constitution of the United States of America: Analysis and Interpretation, 2004 Supplement, Analysis of Cases Decided by the Supreme Court of the United States to June 29, 2004

United States Congressional Serial Set, Serial No. 14742, Senate Document No. 18, Appropriations, Budget Estimates, Etc., V. 1 & 2
Title:
United States Congressional Serial Set, Serial No. 14742, Senate Document No. 18, Appropriations, Budget Estimates, Etc., V. 1 & 2

United States Congressional Serial Set, Serial No. 14742, Senate Document No. 18, Appropriations, Budget Estimates, Etc., V. 1 & 2

Annual Report on International Religious Freedom, 2004
Title:
Annual Report on International Religious Freedom, 2004

Annual Report on International Religious Freedom, 2004

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