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Ideal for backyard stargazers, this introduction to astronomy offers a unique blend of advice and personal observations. Drawn from decades of experiences and enjoyment watching the night sky, Tim B. Hunter helps beginners take up the hobby of watching the night sky. An avid stargazer and astronomy columnist, Hunter covers all the basics-from the Moon, planets, and stars to the history and origins of constellations and selected famous astronomers and events. Emphasis is on naked-eye viewing with an occasional reference to using a pair of binoculars or a small telescope, encouraging beginners to explore the skies while giving them a solid understanding of what they see. Building on his writings for the long-running Sky Spy column, Hunter defines and outlines astronomical terms and how they relate to locating objects in the sky. He weaves in his personal experiences of what he learned about astronomy as a columnist for more than a decade, detailing his mistakes and triumphs to help other would-be astronomers excel in this heavenly hobby.

Written by a well-known and experienced amateur astronomer, this is a practical primer for all aspiring observers of the planets and other Solar System objects. Whether you are a beginner or more advanced astronomer, you will find all you need in this book to help develop your knowledge and skills and move on to the next level of observing. This up-to-date, self-contained guide provides a detailed and wide-ranging background to Solar System astronomy, along with extensive practical advice and resources. Topics covered include: traditional visual observing techniques using telescopes and ancillary equipment; how to go about imaging astronomical bodies; how to conduct measurements and research of scientifically useful quality; the latest observing and imaging techniques. Whether your interests lie in observing aurorae, meteors, the Sun, the Moon, asteroids, comets, or any of the major planets, you will find all you need here to help you get started.

Why is the sky blue and why are sunsets red? When can I see a rainbow? Why is the moon sometimes visible in daylight? In Out of the Blue skywatcher John Naylor offers practical advice about where and when you can expect to see natural phenomena, what you will see and how to improve your chances of seeing it. He takes in both the night and the day sky, and deals only with what can be seen with the naked eye. Drawing on science, history, literature and mythology, and written in a popular style that assumes only basic scientific know-how, Out of the Blue is for everyone who enjoys being outdoors and who feels curious or puzzled about things optical and astronomical.

Sir William Herschel's contributions to astronomy during the late eighteenth century are unrivalled. His lasting legacy is his dedicated all-sky survey of star clusters and nebulae, and these objects continue to be among the most studied in the night sky. This unique book provides a complete re-examination of Herschel's entire catalogue of non-stellar discoveries, making it the most accurate and up-to-date reference of its kind. Retrace the footsteps of one of history's greatest astronomers and explore every one of Herschel's landmark discoveries, including those considered to be lost or non-existent. Read detailed notes about each object's appearance and physical characteristics, and view hundreds of photos of the most intriguing Herschel objects, along with dozens of sketches of what is visible at the eyepiece. This superb book is a must-have for amateur astronomers seeking new and exciting observing challenges, and as the ultimate reference on the Herschel objects.

Have you ever wondered what that bright point of light twinkling near the horizon is, or just when you can expect to see the best shooting stars of the year? A Skywatcher's Year has answers to these and other questions about what is visible in the night sky throughout the year. Through 52 articles arranged week by week, A Skywatcher's Year guides you to celestial events and phenomena that occur or are visible with the naked eye and binoculars for each week of the year. It 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.

The Messier Catalogue is a list of one hundred and ten galaxies, star clusters and nebulae, and includes many of the brightest and best-known objects in the sky. Amateur astronomers can challenge their abilities by attempting to find all the objects on the list in one night, and thus complete the Messier Marathon. This book contains over 90 easy-to-use star maps to guide the observer from one object to the next, and provides tips for a successful night of observing. The book also tells the story of the eighteenth-century astronomer, Charles Messier, and how he came to compile his extensive catalogue. This complete guide to the Messier Marathon will help the amateur astronomer to observe the Messier Objects throughout the year, using a small telescope or even a pair of binoculars.

Stephen James O'Meara presents 109 new objects for stargazers to observe. Each object is accompanied by beautiful photographs and sketches, original finder charts, visual histories and up-to-date astrophysical information to enrich the observing experience. Featuring many exceptional objects, this is an essential guide for any deep-sky observer.

In its Second Edition, this complete guide to buying and using a low-cost amateur astronomical telescope updates computer controls, digital cameras, dropping prices and rising quality of devices. Offers reviews and test reports on available budget telescopes.

In this fresh list, Stephen James O'Meara presents 109 new objects for stargazers to observe. The Secret Deep list contains many exceptional objects, including a planetary nebula whose last thermal pulse produced a circumstellar shell similar to the one expected in the final days of our Sun's life; a piece of the only supernova remnant known visible to the unaided eye; the flattest galaxy known; the largest edge-on galaxy in the heavens; the brightest quasar; and the companion star to one of the first black hole candidates ever discovered. Each object is accompanied by beautiful photographs and sketches, original finder charts, visual histories and up-to-date astrophysical information to enrich the observing experience. Featuring galaxies, clusters and nebulae not covered in other Deep-Sky Companions books, this is a wonderful addition to the series and an essential guide for any deep-sky observer.

We construct the light escape cones of isotropic spot sources of radiation residing in special classes of reference frames in the Kerr–de Sitter (KdS) black hole spacetimes, namely in the fundamental class of ‘non-geodesic’ locally non-rotating reference frames (LNRFs), and two classes of ‘geodesic’ frames, the radial geodesic frames (RGFs), both falling and escaping, and the frames related to the circular geodesic orbits (CGFs). We compare the cones constructed in a given position for the LNRFs, RGFs, and CGFs. We have shown that the photons locally counter-rotating relative to LNRFs with positive impact parameter and negative covariant energy are confined to the ergosphere region. Finally, we demonstrate that the light escaping cones govern the shadows of black holes located in front of a radiating screen, as seen by the observers in the considered frames. For shadows related to distant static observers the LNRFs are relevant.