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Product Description
The original "Explanatory Supplement to the Astronomical Ephemeris and the American Ephemeris and Nautical Almanac" was published in 1961 and revised in 1974. In 1981 the series of publications titled "The Astronomical Ephemeris" and the "American Ephemeris and Nautical Almanac" were continued under the single title "The Astronomical Almanac". Thus, the title of the new edition of the "Explanatory Supplement". In the 1970s it was recognized that there was a need to revise the planetary and lunar ephemerides, the FK4 star catalog, the time scales, the System of Astronomical Constants and the Theory of Nutation. In 1984 all these revisions were introduced using the new standard epoch J2000.0, thus making the original "Explanatory Supplement" out of date. Hence, the new version was prepared based on the FK5 star catalog, the IAU (1976) System of Astronomical Constants, the new time scales, including those adopted in 199 1, the IAU (1980) Theory, of Nutation, and the DE200/LE200 ephemerides. Improvements since 1984 have also been incorporated. Current values of astrometric and planetary data are included. "Explanatory Supplement to the Astronomical Almanac" provides a detailed description of the means of performing practical astronomy or spherical astronomy. It shows how computations for the "Astronomical Almanac" are performed and the underlying information required by someone using that publication or wanting to perform related computations. It is intended to be a reference volume for anybody working with accurate positional astronomical data and anyone interested in investigations of the solar system.
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First Sentence
The Astronomical Almanac gives data on the positions and, where appropriate, orientations of the Sun, Moon, planets, satellites, and stars as they may be seen from the surface of the Earth during the course of a year. Read the first page
Front Cover | Copyright | Table of Contents | Excerpt | Index | Back Cover
The Astronomical Almanac gives data on the positions and, where appropriate, orientations of the Sun, Moon, planets, satellites, and stars as they may be seen from the surface of the Earth during the course of a year. Read the first page
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Front Cover | Copyright | Table of Contents | Excerpt | Index | Back Cover
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2 reviews
27 of 29 people found the following review helpful
Explanatory Supplement to the Astronomical Almanac
27 Mar 2000
If you need to know the details of astronomical or geodetic computations, or need to know how the tables in the Astronomical Almanac are computed, or need to know what the various versions of "Universal Time" are and how to compute them, you need this book. It is the definitive reference for many things, and gives you the definitive reference for the rest.
6 of 6 people found the following review helpful
Be careful, many errors
1 Jun 2010
The 1992 Explanatory Supplement has, unfortunately, many errors and typos. Be very careful using any data from it. Look up the published errata online, and if you can, look up the original sources also, as all of the errors are not in the errata!
Other than that, it is the definitive source, and the references alone are a goldmine of information. If you are really deep into astronomical ephemerides, you should get a copy of the 1961 Supplement also. It goes deeper into the trig math, and doesn't use a lot of vector math like the 1992 version.
Other than that, it is the definitive source, and the references alone are a goldmine of information. If you are really deep into astronomical ephemerides, you should get a copy of the 1961 Supplement also. It goes deeper into the trig math, and doesn't use a lot of vector math like the 1992 version.
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