Here is a unique and fascinating reference book for every serious deep-sky observer! Entries for each of more than 500 deep-sky objects provide far more than the usual astronomical data – they also detail, in every case, the most interesting facts. Physical factors, astrophysical information, evolution, unusual features, the list is endless. The objects are all listed in NGC order. Astronomers can now get an insight into exactly what they are looking at, to add a new level of insight and enjoyment to deep-sky observing.

This book is for the amateur astronomer who wants to know about the astrophysical nature of deep sky objects. The information is presented in a concise format and is equally valuable when used as background reading or, alternatively, at the telescope eyepiece. The past decades have seen an unprecedented increase in professional astronomers' understanding of astronomical objects. However, generally this information is contained in journal publications that most amateur astronomers either do not have access to or would find difficult to read. In this book, basic data on each object (e.g., magnitude, location, distance, age if known) is presented in a way that allows the reader to quickly access the information. This is followed by some remarks that capture the most fascinating astrophysical facts. Although there are thousands of deep sky objects observed by astronomers, only a small number of these are commonly observed by a wide audience. Thus, coverage here is limited to approximately 500 of the most commonly observed objects in the Northern Hemisphere and – an enhancement for the Second Edition – approximately 50 of those in the Southern Hemisphere. These are visible from the southern limits of the United States as well as from the southern continents. Another new feature of the Second Edition is the addition of amateur photographic images of all the Messier objects.

"Library catalogue in 1911" (31 p.) appended to v. 4.

"A review of astronomy" (varies).

The New Walford highlights the best resources to use when undertaking a search for accurate and relevant information, saving you precious time and effort. For those looking for a selective and evaluative reference resource that really delivers on its promise, look no further. In addition to print sources, The New Walford naturally covers an extensive range of e-reference sources such as digital databanks, digital reference services, electronic journal collections, meta-search engines, networked information services, open archives, resource discovery services and websites of premier organizations in both the public and private sectors. But rather than supplying a list of all available known resources as a web search engine might, The New Walford subject specialists have carefully selected and evaluated available resources to provide a definitive list of the most appropriate and useful. With an emphasis on quality and sustainability, the subject specialists have been careful to assess the differing ways that information is framed and communicated in different subject areas. As a result the resource evaluations in each subject area are prefaced by an introductory overview of the structure of the relevant literature. This ensures that The New Walford is clear, easy-to-use and intuitive. - Publisher.

Publisher's Note: Products purchased from Third Party sellers are not guaranteed by the publisher for quality, authenticity, or access to any online entitlements included with the product. A major revision of this classic encyclopedia covering all areas of science and technology, the McGraw-Hill Concise Encyclopedia of Science and Technology, Sixth Edition, is prepared for students, professionals, and general readers seeking concise yet authoritative overviews of topics in all major fields in science and technology. The McGraw-Hill Concise Encyclopedia of Science and Technology, Sixth Edition, satisfies the needs of readers for an authoritative, comprehensive reference work in a relatively compact format that provides the breadth of coverage of the McGraw-Hill Encyclopedia of Science & Technology, 10th Edition. Written in clear, nonspecialist language understandable to students and general readers, yet with sufficient depth for scientists, educators, and researchers, this definitive resource provides: 7100 concise articles covering disciplines of science and technology from acoustics to zoology Extensively revised content with new and rewritten articles Current and critical advances in fast-developing fields such as biomedical science, chemistry, computing and information technology, cosmology, environmental science, nanotechnology, telecommunications, and physics More than 1600 two-color illustrations 75 full-color plates Hundreds of tables and charts 1300 biographical sketches of famous scientists Index containing 30,000 entries Cross references to related articles Appendices including bibliographies and useful data McGraw-Hill Professional science reference products are supported by MHEST.com, a website offering updates to articles, periodic special features on important scientific topics, multimedia content, and other features enriching the reader's experience. We encourage readers to visit the site often. Fields Covered Include: Acoustics Aeronautics Agriculture Anthropology Archeology Astronomy Biochemistry Biology Chemistry Computers Cosmology Earth Science Engineering Environmental Science Forensic Science Forestry Genetics Geography Immunology Information Science Materials Science Mathematics Medicine and Pathology Meteorology and Climate Science Microbiology Nanotechnology Navigation Neuroscience Oceanography Paleontology Physics Physiology Psychiatry Psychology Telecommunications Theoretical Physics Thermodynamics Veterinary Medicine Virology Zoology