Download or read book Explanatory Supplement to the Astronomical Almanac written by United States Naval Observatory. Nautical Almanac Office and published by University Science Books. This book was released on 1992 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt: This well-schooled text provides a detailed description of how to perform practical astronomy or spherical astronomy. It is an authoritative source on astronomical phenomena and calendars.