Review"An enormous amount of obscure data is satisfactorily explained here, which is just what you turn to a dictionary for."--Times Literary SupplementProduct DescriptionThis revised edition contains 4,000 up-to-date entries written by an expert team of contributors, under the editorship of Ian Ridpath, renowned author and broadcaster. Covering the most recent space exploration missions and latest technological development, this authoritative dictionary coverseverything from astrophysics to galaxies and time. World-wide coverage of observatories and telescopes, and major entries on supernova, Big Bang theory, and stellar evolution, make this an invaluable reference source for students, professionals, and amateur astronomers. Appendices include tables ofApollo lunar landing missions and the constellations. The entries are supported by numerous tables and diagrams, and the dictionary also features biographical entries on eminent astronomers.About the AuthorIan Ridpath, an amateur astronomer, is an author and broadcaster on stars and planets for a general audience. He is the editor of, among other titles, Norton's Star Atlas, and The Monthly Sky Guide.