The Astronomical Almanac for the Year 2021 : and its companion The Astronomical Almanac Online : data for astronomy, space sciences, geodesy, surveying, navigation and other applications / issued by the Nautical Almanac Office United States Naval Observatory by direction of the Secretary of the Navy and under the authority of Congress, ; issued by Her Majesty's Nautical Almanac Office on behalf of The United Kingdom Hydrographic Office.

• A. Phenomena -- B. Time-scales and coordinate systems -- C. Sun -- D. Moon -- E. Planets -- F. Natural satellites -- G. Dwarf planets and small solar system bodies -- H. Stars and stellar systems -- J. Observatories -- K. Tables and data. 

• Prepared jointly with Her Majesty's Nautical Almanac Office, United Kingdom Hydrographic Office. Designed in consultation with other astronomers of many countries. Provides current, accurate astronomical data for use in the making and reduction of observations and for general purposes. The Astronomical Almanac Online extends the printed version by providing data best presented in machine-readable form. Online data are provided for several years. Contains data for astronomy, space sciences, geodesy, surveying, navigation, and other applications. Also used for navigation by air and water.The Astronomical Almanac is a joint publication of the U.S. Nautical Almanac Office, United States Naval Observatory (USNO), in the United States and Her Majesty's Nautical Almanac Office (HMNAO), United Kingdom Hydrographic Office (UKHO), in the United Kingdom. This annual publication contains precise ephemerides of the Sun, Moon, planets, and satellites, data for eclipses and other astronomical phenomena for a given year, and serves as a world-wide standard for such information. 

Ämnesord

Astronomi  (sao)

Efemerider (astronomi)  (sao)

Nautical almanacs  -- Periodicals. (LCSH)

Ephemerides  -- Periodicals. (LCSH)

Astronomy  (LCSH)

Ephemerides  (LCSH)

Genre

Almanackor  (saogf)

Seriella publikationer  (saogf)

Tabeller  (saogf)

Indexterm och SAB-rubrik

Uafa Almanackor

Klassifikation

528 (DDC)

Uafa (kssb/8)