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The definitive astronomical almanac - Now the 104th edition! A must for every observer and observatory.

The Observer’s Handbook is a 358 page guide published annually since 1907 by the Royal Astronomical Society of Canada. Through its long tradition and the expertise of more than 40 contributors, the Observer’s Handbook has come to be regarded as the standard North American reference for data on the sky. The material in the Handbook is of interest to professional and amateur astronomers, scientists, teachers at all levels, students, science writers, campers, scout and guide leaders, as well as interested general readers. The Observer’s Handbook is an integral part of many astronomy courses at the secondary and university levels, and it should be on the reference shelf of every library.