The revised second edition of this established dictionary contains over
4,300 up-to-date entries on all aspects of astronomy. Compiled with the
help of thirty-four expert contributors under the editorship of renowned
author Ian Ridpath, the book covers everything from space exploration
and the equipment involved, to astrophysics, cosmology, and the concept
of time--plus biographical entries on eminent astronomers and worldwide
coverage of observatories and telescopes. The appendices include tables
of Apollo lunar landing missions, the constellations, and a table of
planetary data. The entries have been fully revised and updated and
fifty new entries have been added. The content is enhanced by web links
which are regularly updated on a companion website.