The Astronomical Almanac 1993 - Hardcover

This volume is prepared jointly by the Nautical Almanac Office, United States Naval Observatory and HM Nautical Almanac Office, Royal Greenwich Observatory, and is designed in consultation with astronomers from many countries. It intended to provide current, accurate astronomical data for use in the making and reduction of observations, and for general purposes. A brief description of the use of each ephemeris is given and basis and additional notes are provided in the explanation at the end of the volume.