Derived from the world-renowned McGraw-Hill Dictionary of Scientific and Technical Terms, Sixth Edition, this vital reference offers a wealth of essential information in a portable, convenient, quick-find format. Whether you're a professional, a student, a writer, or a general reader with an interest in science, there is no better or more authoritative way to stay up-to-speed with the current language of astronomy or gain an understanding of its key ideas and concepts.Written in clear, simple language understandable to the general reader, yet in-depth enough for scientists, educators, and advanced students, the McGraw-Hill Dictionary of Astronomy, Second Edition: Has been extensively revised, with 3600 entries that fully define the language of astronomy Includes hundreds of synonyms, acronyms, and abbreviations Provides pronunciations for all terms Covers such topics as planets, stars, constellations, galaxies, comets, asteroids, nebulae, and astrophysics, as well as aerospace engineering Includes appendices containing listings of planets, satellites, asteroids, meteor showers, constellations, stars, galaxies, telescopes, and more Is based on the McGraw-Hill Dictionary of Scientific and Technical Terms -- for more than a quarter-of-a-century THE standard international reference.