Recombination lines at radio wavelengths have been - and still are - a p- erful tool for modern astronomy. For more than 30years, they have allowed astronomers to probe the gases from which stars form. They have even been detected in the Sun. In addition, observations of these spectral lines facilitate basic research into the atom, in forms and environments that can only exist in the huge dimensions and extreme conditions of cosmic laboratories. We intend this book to serve as a tourist's guide to the world of Radio Recombination Lines. It contains three divisions: a history of their discovery, the physics of how they form and how their voyage to us in?uences their spectral pro?les, and a description of their many astronomical contributions todate.Theappendixincludessupplementarycalculationsthatmaybeuseful to some astronomers. This material also includes tables of line frequencies from 12MHz to 30THz (?=10?m) as well as FORTRAN computer code to calculate the ?ne-structure components of the lines, to evaluate radial matrix integrals, and to calculate the departure coe?cients of hydrogen in a cosmic environment. It also describes how to convert observational to astrophysical units.The textincludes extensive referencestothe literature toassistreaders who want more details. We appreciate the help of L.W. Avery, D.S. Balser, T.M. Bania, T. Bastian, J.H. Bieging, H.J.J. Blom, N.G. Bochkarev, R.L. Brown, L.A. Bureeva (Minaeva), W.B. Burton, T. Alan Clark, Z.F. Dravskikh, W.C.

When can you see fireballs and who should you contact if you spot one? When is it best to hunt for comets and meteors and whereabouts? How do you gauge the size of the coma in the head of a comet and estimate its degree of condensation? Clear and easy to use, this guide shows you how to make successful and valuable observations and records of comets, asteroids, meteors and the zodiacal light. For each topic the historical background and current scientific understanding support a wealth of observational techniques. Comet observers are shown techniques for search and discovery. They can learn how to make visual estimates of brightness and size, and how to make photographic studies of cometary heads and tails. Asteroid hunters will find a 'life list' of quarry and guidelines on how to search for these objects and then how to photograph or electronically image them. Fruitful photographic and electronic methods for studying meteors and meteor showers are provided. Visual and photographic techniques show you how to examine the often elusive zodiacal light.

Arditti's approachable work covers the all the details of design, siting and construction - once a basic type has been decided upon. It is written in a way that is equally applicable to the USA and UK (where there are slightly different building regulations) and deals with matters that are basic to building and commissioning any amateur observatory. Uniquely, David Arditti also considers the aesthetics of amateur observatories - fitting them in with family and neighbors, and maybe disguising them as more common garden buildings if necessary. Every amateur astronomer who wants a purpose-built observatory (and let's face it, which one of them doesn't?) will find this book invaluable.

Many lights and other objects in the sky go unrecognised, or at least are little understood by those observing them. Such things range from the commonplace like rainbows and meteors, to the distinctly unusual like the green flash and ball lightning. And there is still a residuum of objects that remain unidentified by the watcher - classed generally as 'UFOs', a description which today has connotations of the mysterious, even of extraterrestrial visitors. The first part of this book is an identification guide, very much like the "plant identifier" sections found in a good gardening or botany book. It allows quick (and structured) identification of known aerial phenomena, whether at night or during the day. The objects thus found are referenced to the second part of the book... The second part gives a full description, physical explanation, and where relevant notes on observing and photographing the various phenomena. Some will need optical aids such as binoculars or telescopes, but the main thrust of the book is identification and explanation rather than imaging. The final chapter approaches UFOs from a scientific standpoint, particularly the way in which human perception and often preconception affects the outcome. It does however finish with a short section on "extraterrestrial UFOs", emphasising the burden of proof aspect and touching on the scientific theories of life on other worlds and the improbability of visitors.

This text describes the development of astronomy in the Extreme Ultraviolet (EUV) wavelength range, from the first rocket-based experiments in the late 1960s through to the latest satellite missions. Discussions of the results from the most important space projects are followed by an analysis of the contributions made by EUV astronomy to the study of specific groups of astronomical objects. Within this framework, the book provides detailed material on the tools of EUV astronomy, dealing with the instrumentation, observational techniques, and modelling tools for the interpretation of data. Prospects for future EUV missions are discussed, and a catalogue of the known EUV sources is included. This timely book will be of great value to graduate students and researchers. It is the first to give a complete overview of Extreme Ultraviolet Astronomy, and comes at the end of a major phase of discovery in the field.

The spectacular collision of comet Shoemaker-Levy 9 with Jupiter in July 1994 was a unique event in the history of observational astronomy. With a year's advance warning, astronomers and planetary scientists around the world were able to co-ordinate an observing campaign to track the event in unprecedented detail. A year after the event, a workshop at the Space Telescope Science Institute provided the first opportunity for them to bring together their observations and found a new understanding of the impact. Based on this meeting, sixteen invited reviews from authors selected as international leaders in the study of the impact and its aftermath are presented in this volume. The chapters have been edited and arranged to provide a thorough and comprehensive overview of our knowledge of the event. While our understanding of the impact will evolve with future work, this book provides a solid foundation for new insights that will follow. It will be a standard reference for graduate students and researchers in astronomy and planetary science.

Not all amateur astronomers who live in a suburban location realize just how very effective a a ~chilled-chipa (TM) astronomical CCD-camera and software can be at cutting through seemingly impenetrable light-pollution. CCD Astrophotography from the Suburbs details one mana (TM)s approach to the problem of getting high-quality astronomical images under light-polluted conditions. Adam Stuart has written this reference book for all amateur astronomers who are interested in CCD imaging, especially those who have to work under suburban conditions. The book outlines the materials and (commercially-available) equipment used for high-quality imaging. The many wonderful images Dr. Stuart has produced allow the reader to see the product of a" initially a" a fellow beginnera (TM)s efforts. The glorious images found in numerous books, and especially those seen in Sky and Telescope magazine a" might seem out of reach. But this is not really the case. Respectable images are attainable with modest equipment. This book outlines a complete and thoroughly tested working program for every beginner to achieve high-quality digital imaging.

In the last few years, cheap webcams have revolutionized amateur astronomy, by providing a very inexpensive alternative to purpose-made astronomical CCD cameras, which use refrigerated imaging chips and are thus extremely expensive. Webcams are capable of more advanced work than 'normal' digital cameras because their simple construction makes it easy to remove the webcam's lens, allowing it to be interfaced directly to a telescope. Using a webcam is not difficult, but most amateur astronomers who have tried to do this do not achieve the finest results, despite the webcam's potential. There are numerous imaging and image processing tricks and techniques, and all of them are needed to get the best results. Along with webcam technology has come simple-to-use image processing and enhancement using a PC: the most powerful technique is, 'stacking' in which the best images (out of hundreds) are selected and summed automatically to provide startlingly good results. Lunar and Planetary Webcam User's Guide de-mystifies the jargon of webcams and computer processing, and provides detailed hints and tips for imaging the Sun, Moon and planets with a webcam. specialised techniques in context. Glance through the images in this book to see just how much you can - easily - achieve by using a webcam with your telescope

This 1990 book is the official history of the Anglo-Australian Telescope which started to be built at Coonabarabran in New South Wales in 1968 and came into operation in 1974. The telescope is part of the Anglo-Australian Observatory which provides facilities for research in optical astronomy for scientists from Britain and Australia. The authors of this book were all involved in different capacities throughout the development of the telescope. As such it gives a detailed and personal record of the scientific, administrative and political developments from the moment negotiations began to the present day. The AAT has been, and continues to be, an outstanding success and can lay claim to being the best instrumented telescope in the world, with a very wide capability and high sensitivity. This is a unique and important book.

A new source of funding for astronomy stemmed from the creation of the National Science Foundation (NSF) in 1950. Astronomers were quick to take advantage of the opportunities this provided to found new observatories. In this 1997 book, the science and politics of the establishment, funding, construction and operation of the Kitt Peak National Observatory (KPNO) and the Cerro Tololo Inter-American Observatory (CTIO) by the Association of Universities for Research in Astronomy (AURA) are seen from the unique perspective of Frank K. Edmondson, a former member of the AURA board of directors. AURA was asked to manage the Sacramento Peak Observatory (SPO) in 1976, and in 1983 the National Solar Observatory (NSO) was formed by merging the SPO and the KPNO solar programs. In 1981 NASA chose AURA to establish and operate the Space Telescope Science Institute (STScI). This is a personal account of a period of major innovation in American optical astronomy.

Radio astronomy has revolutionized the course of modern astronomy. Marking the fiftieth anniversary of Jansky??'s discovery in 1933 of extraterrestrial radio emission, Professor Sullivan asked many of the pioneers in the field to set down their versions of events and the people who made them. Each of the score of contributors seeks to give a good ???feeling??? for the times to the great majority of readers who will not have experienced them. Over 150 illustrations, mostly historical photographs of men and machines, enliven the various recollections and reflections. The list of contributors includes many of the key personalities and covers all the major laboratories and countries involved in radio astronomy before 1960. In addition to the radio astronomers themselves, there are contributions from optical astronomers and theorists closely related to the field, as well as historians of twentieth century astronomy.

What can emission lines tell us about an astrophysical object? A workshop at the Space Telescope Science Institute was dedicated to address just this question - for a host of objects (including planetary nebulae and active galactic nuclei) across a broad range of wavelengths (from the infrared through to gamma-rays). Thirteen review articles from internationally renowned experts are presented in this volume. They provide an edited and coherent overview of the latest technical data, techniques in and applications of the study of emission lines from a variety of objects. Chapters include the theory of radiative transfer, photoionising shocks, and emission lines from stellar winds, as well as useful summaries of abundance determinations, atomic data, and diagnostics for IR, UV, gamma-ray and molecular lines. Together these review articles provide an overview of the analysis of emission lines. They summarise current knowledge, highlight outstanding problems and provide focus for fruitful future research. In this way they provide an excellent introduction for graduate students and reference for professionals.

Modern astronomical telescopes, along with other advances in technology, have brought the deep sky - star clusters, nebulae and the galaxies - within reach of amateur astronomers. And it isn't even necessary to image many of these deep-sky objects in order to see them; they are within reach of visual observers using modern techniques and enhancement technology.

The first requirement is truly dark skies; if you are observing from a light-polluted environment you need Tony Cooke's book, Visual Astronomy in the Suburbs. Given a site with clear, dark night skies everything else follows... this book will provide the reader with everything he needs to know about what to observe, and using some of today's state-of-the-art technique and commercial equipment, how to get superb views of faint and distant astronomical objects.

What do we understand of the birth and death of stars? What is the nature of the tiny dust grains that permeate our Galaxy and other galaxies? And how likely is the existence of brown dwarfs, extrasolar planets or other sub-stellar mass objects? These are just a few of the questions that can now be addressed in a new era of infrared observations. IR astronomy has been revolutionised over the past few years by the widespread availability of large, very sensitive IR arrays and the success of IR satellites (IRAS in particular). Several IR space missions due for launch over the next few years promise an exciting future too. For these reasons, the IV Canary Islands Winter School of Astrophysics was dedicated to this burgeoning field. Its primary goal was to introduce graduate students and researchers from other areas to the important new observations and physical ideas that are emerging in this wide-ranging field of research. Lectures from nine leading researchers, renowned for their teaching abilities, are gathered in this volume. These nine chapters provide an excellent introduction as well as a thorough and up-to-date review of developments - essential reading for graduate students entering IR astronomy, and professionals from other areas who realise the importance that IR astronomy may have on their research.

This introduction to basic practical tools, methods and phenomena in quantitative astronomy covers topics across a wide range of areas, from radio to gamma-ray wavelengths. Clear presentations of the topics are accompanied by diagrams and problem sets. Written for undergraduates and graduate students, the book will introduce them to the practice and study of quantitative and analytical astronomy and astrophysics.

David Levy has held a lifelong passion for comets, and is one of the most successful comet discoverers in history. In this book he describes the observing techniques that have been developed over the years--from visual observations and searching, to photography, through to electronic charge-coupled devices (CCDs). He combines the history of comet hunting with the latest techniques, showing how our understanding of comets has evolved over time. This practical handbook is suitable for amateur astronomers, from those who are casually interested in comets and how to observe them, to those who want to begin and expand an observing program of their own. Drawing widely from his own extensive experience, Levy describes how enthusiastic amateurs can observe comets and try to make new discoveries themselves. David H. Levy is one of the word's foremost amateur astronomers. He has discovered seventeen comets, seven using a telescope in his own backyard, and had a minor planet, Asteroid 3673 Levy named in his honor. He is best known as the co-discoverer of the famous 1994 Shoemaker-Levy 9 comet. Levy is frequently interviewed in the media and succeeded Carl Sagan as science columnist for Parade magazine. He has written and contributed to a number of books, most recently David Levy's Guide to the Night Sky (Cambridge, 2001).

Electromagnetic scintillation describes the phase and amplitude fluctuations imposed on signals that travel through the atmosphere. Providing a modern reference and comprehensive tutorial for this subject, two volumes cover optical and microwave propagation, integrating measurements and predictions at each step of development. The first volume (published September 2001) dealt with phase and angle-of-arrival measurement errors, which are accurately described by geometrical optics. This second volume concentrates on amplitude and intensity fluctuations of the received signal. Also available...Volume I 0-521-80198-2 Hardback $110.00 C

This is a remarkable story of the building of the Lick Observatory on Mount Hamilton in California. Helen Wright's informative account vividly describes the founding of the observatory by the millionaire James Lick, as well as the pioneering role that Captain Richard Floyd played in its eight-year construction. The author details the personalities, the many unique circumstances, and the extraordinary production obstacles that were involved in the building of the first high-altitude astronomical observatory, which was finally opened as part of the University of California on June 1, 1888. Based on exhaustive research, this work makes a valuable contribution to the history of astronomy. The volume is enhanced by a fascinating collection of original photographs from the period that are of great historical interest. James Lick's Monument will appeal to a wide audience, including professional and amateur astronomers, historians of science, and all other readers interested in astronomy and its history.

This introduction to the use of radar for remote sensing of natural surfaces provides the reader with a thorough grounding in practical applications, focusing particularly on terrestrial studies that may be extended to other planets. An historical overview of the subject is followed by an introduction to the nomenclature and methodology pertaining to radar data collection, image interpretation and surface roughness analysis. The author presents a summary (illustrated with examples from the natural environment) of theoretical explanations for the backscatter properties of continuous rough surfaces, collections of discrete objects, and layered terrain.

With the discovery of planets beyond our solar system 25 years ago, exoplanet research has expanded dramatically, with new state-of-the-art ground-based and space-based missions dedicated to their discovery and characterisation. With more than 3,500 exoplanets now known, the complexity of the discovery techniques, observations and physical characterisation have grown exponentially. This Handbook ties all these avenues of research together across a broad range of exoplanet science. Planet formation, exoplanet interiors and atmospheres, and habitability are discussed, providing in-depth coverage of our knowledge to date. Comprehensively updated from the first edition, it includes instrumental and observational developments, in-depth treatment of the new Kepler mission results and hot Jupiter atmospheric studies, and major updates on models of exoplanet formation. With extensive references to the research literature and appendices covering all individual exoplanet discoveries, it is a valuable reference to this exciting field for both incoming and established researchers.

The 20-cm (8-in) Schmidt-Cassegrain telescope is the most popular telescope in the world. This compact instrument revolutionized amateur astronomy and astrophotography, and more than ten thousand are purchased each year. Manly, a devotee and keen user of the Schmidt-Cassegrain, takes the telescope owner, in easy stages, through all aspects of using the telescope. He starts with techniques for viewing the Moon, then takes the observer through our planetary system, and on to the deep sky, where nebulae and galaxies are treated extensively. There are interesting projects to try, such as observing the nearest star and chasing eclipses. The book describes a full range of telescope accessories and detectors together with advice on their use. The 40-page appendix is packed with hard-to-find practical information. Peter Manly is the author of Unusual Telescopes (CUP, 1992).

If you have ever watched shooting stars graze the sky or wondered about a particularly bright point of light near the horizon, then this is the book for you. A Skywatcher's Year is the authoritative guide to visible bodies in the night sky throughout the year. Through fifty-two essays, Jeff Kanipe guides you to celestial events and phenomena that occur or are visible with the naked eye and binoculars for each week of the year. He acquaints you not only with up-to-date astronomical information on stars, nebulae, meteors, the Milky Way, and galaxies, but also conveys the beauty and wonder of the night sky. Covering both the Northern Hemisphere and Southern Hemisphere, A Skywatcher's Year helps readers find prominent stars and constellations, bright star clusters, nebulae, and galaxies, and explains how and when to observe prominent annual meteor showers. Kanipe also examines the most frequently-observed celestial body, the Moon, and the intriguing lore surrounding it. A rich and jargon-free look at the sky through the four seasons, this engaging book will give new dimensions to backyard star-gazing.

Infrared astronomy is a dynamic area of current research. It has been revolutionized in the past few years by the advent of large, sensitive, infrared arrays, and the success of several infrared satellites. This handbook provides a clear, concise and accessible reference on all aspects of infrared astronomy. Throughout, the emphasis is on fundamental concepts, practical considerations and useful data. Starting with a review of the basic infrared emission mechanisms, we are shown how the earth's atmosphere affects and limits observations from ground-based telescopes. The important systematics of photometric accuracy are treated in detail. Spectroscopy--both stellar and otherwise--is explained, and illustrated with useful examples. An important chapter is devoted to dust, which plays such a central role. Finally, the technical background to infrared instrumentation is covered to help the reader develop a proper understanding of the capabilities and limitations of infrared observations. This volume provides both an essential introduction for graduate students making infrared observations or reducing infrared data for the first time, and a convenient reference for more experienced researchers.

With this extraordinary handbook, you, too, can frame the stars and have them hanging on your livingroom walls. Astrophotography for the Amateur provides a complete guide to taking pictures of stars, galaxies, the Moon, the Sun, comets, meteors and eclipses, using equipment and materials readily available to the hobbyist. Based on suggestions from readers of the first edition, the new edition has been completely updated and expanded to include new chapters on computer image processing and CCD imaging; expanded advice on choosing cameras and telescopes; completely updated information about films; a much larger bibliography; and hundreds of new photographs (in color and black and white) demonstrating the latest equipment and techniques. Astrophotography for the Amateur has become the standard handbook for all amateur astronomers. This new edition provides an ideal introduction for beginners and a complete handbook for advanced amateurs. It will also appeal to photography enthusiasts who will discover how to take spectacular images with only modest equipment. Michael A. Covington received his Ph.D. at Yale University. He is the author of several books, including Syntactic Theory in the High Middle Ages (Cambridge, 1984). He is a Senior Member of the IEEE and is the Associate Director of the Artificial Intelligence Center at the University of Georgia.

Every year large numbers of people take up the study of astronomy, mostly at amateur level. There are plenty of elementary books on the market, full of colourful photographs, but lacking in proper explanations of how and why things are as they are. Many people eventually wish to go beyond the 'coffee-table book' stage and study this fascinating subject in greater depth. This book is written for them. In addition, many people sit for public examinations in this subject each year and this book is also intended to be of use to them. All the topics from the GCSE syllabus are covered here, with sample questions at the end of each chapter. Astronomy Explained provides a comprehensive treatment of the subject in more depth than is usually found in elementary works, and will be of interest to both amateur astronomers and students of astronomy.