三民網路書店 / 搜尋結果

David Levy brings these "ghostly apparitions" to life. With fascinating scenarios both real and imagined, he shows how comets have wreaked their special havoc on Earth and other planets. Beginning wi

Variable stars are fascinating objects to observe; found all over the sky, they change in brightness over time and can be seen with even the most basic of equipment. Variable star astronomy is one field in which amateur astronomers can still make significant contributions to science and in this highly accessible book David Levy teaches the reader how variable stars work, and how to observe them. Using simple, non-technical terms he explains how to get started with electronic (or CCD) observing, as well as how to observe variable stars through a small telescope or binoculars. Including a section on Southern hemisphere stars, the book covers various types of object that can be observed by amateur astronomers, including more exotic phenomena like gamma ray bursts, blazars, and polars. This book will serve to motivate anyone with even a basic interest in astronomy to begin observing these fascinating objects.

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

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.

The perfect introduction for the novice astronomer, this book stirs the imagination and puts observation in a framework of social activity and personal adventure. Written by an award-winning astronomer, it is a technical guide to the sky, full of helpful practical hints. The author's lively style engages, entertains, and informs. Newcomers will learn how to enjoy the Moon, planets, comets, meteors, and distant galaxies observable through a small telescope. Levy describes the features of the Moon from night to night; how to observe constellations; how best to view the stars, nebulae, and galaxies; how to follow the planets on their annual trek among the constellations; how to map the sky; how to find a new comet; how to buy or even make a telescope; what to see in a month of lunar observations or a year of stellar observation; and much more.

David Levy's entertaining, well-researched book is aimed at the amateur enthusiast who likes to learn enjoyably. Beginning with advice on binoculars and telescopes, and how to observe the night sky effectively, the author goes on to describe thoroughly the field of variable star observation, a field in which amateurs have made important contributions. He shows how to interpret variations in light output in terms of the life of a star, from birth through to sometimes violent death. All of the major variable stars are described and classified, as well as other variable objects such as active galaxies, asteroids, comets and the sun. The book also contains a guide to the seasonal night sky. Throughout, practical observations serve to complement the text, producing an exciting, very readable introduction to this fascinating subject.

Meteors occur when a meteoroid, a speck of dust in space, enters the Earth's atmosphere. The heat generated when this happens causes the surrounding air to glow, resulting in 'shooting stars'. During

Over the centuries the starry night sky has inspired poets and scientists alike, and though the fruits of these inspirations take very different forms, they often enrich each other. Acclaimed science

In this simple guide, David Levy inspires readers to experience the wonder of eclipses and other transient astronomical events for themselves. Covering both solar and lunar eclipses, he gives step-by-step instructions on how to observe and photograph eclipses. As well as explaining the science behind eclipses, the book also gives their historical background, discussing how they were observed in the past and what we have learned from them. This personal account contains examples from the 77 eclipses the author has witnessed himself. The guide also includes chapters on occultations of stars and planets by the Moon and of asteroids by stars, and the transits of Mercury and Venus. Tables of future eclipses make this invaluable for anyone, from beginners to practised observers, wanting to learn more about these fascinating events.

A discoverer or co-discoverer of 21 comets, Levy helps astronomy buffs in any hemisphere and locale find 100 deep sky objects, such as double and triple stars, nebulae, galaxies and quasars. He offers

This new bedside manual guides you through all the practical aspects of managing patients following cardiothoracic surgery and critically ill cardiology patients. Primarily designed to use in cardiot

The Messier Guide for the modern age. Exquisite and highly detailed drawings made from the darkest skies on Earth are combined with a thoroughly modern text in this ultimate field guide to the finest

This thoroughly updated Fifth Edition is a comprehensive, practical guide to recognizing, preventing, and treating work-related and environmentally-induced injuries and diseases. Chapters by experts

This textbook includes both occupational and environmental health information, providing the necessary foundation for recognizing and preventing work-related and environmentally induced injuries and d

"This splendid book [...]is authoritative, well written, and ably edited." - Occupational & Environmental Medicine "The book provides a logical, structured exposition of a diverse multidisciplinar