Explanatory Supplement to the Astronomical Almanac

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Summary: Explanatory Supplement to the Astronomical Almanac
Review: 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.