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Author: Edgar Gardner Murphy
Publisher:
ISBN:
Category : Astronomy
Languages : en
Pages : 188
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Book Description
Author: Edgar Gardner Murphy
Publisher:
ISBN:
Category : Astronomy
Languages : en
Pages : 188
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 864
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Author:
Publisher:
ISBN:
Category : Bibliography
Languages : en
Pages : 864
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Author:
Publisher:
ISBN:
Category : Bibliography
Languages : en
Pages : 870
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Book Description
Author:
Publisher:
ISBN:
Category : Union catalogs
Languages : en
Pages : 712
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Book Description
Author: Louis Shores
Publisher:
ISBN:
Category : Bibliographical literature
Languages : en
Pages : 1082
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Book Description
Author: Robert Newton Mayall
Publisher: Golden Guides from Saint Martin's Press
ISBN: 9780307240095
Category : Juvenile Nonfiction
Languages : en
Pages : 160
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Book Description
Discusses how to select and use binoculars and telescopes, how to observe planets, meteors, comets, and other celestial bodies, and how to use star charts.
Author: Jostein Gaarder
Publisher: Farrar, Straus and Giroux
ISBN: 1466804270
Category : Fiction
Languages : en
Pages : 599
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Book Description
A page-turning novel that is also an exploration of the great philosophical concepts of Western thought, Jostein Gaarder's Sophie's World has fired the imagination of readers all over the world, with more than twenty million copies in print. One day fourteen-year-old Sophie Amundsen comes home from school to find in her mailbox two notes, with one question on each: "Who are you?" and "Where does the world come from?" From that irresistible beginning, Sophie becomes obsessed with questions that take her far beyond what she knows of her Norwegian village. Through those letters, she enrolls in a kind of correspondence course, covering Socrates to Sartre, with a mysterious philosopher, while receiving letters addressed to another girl. Who is Hilde? And why does her mail keep turning up? To unravel this riddle, Sophie must use the philosophy she is learning—but the truth turns out to be far more complicated than she could have imagined.
Author: Neil English
Publisher: Springer Science & Business Media
ISBN: 1441964037
Category : Science
Languages : en
Pages : 284
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Book Description
Choosing and Using a Refracting Telescope has been written for the many amateur astronomers who already own, or are intending to purchase, a refracting telescope – perhaps to complement their existing arsenal of larger reflecting telescopes – or for the specialist who requires a particular refractor for serious astronomical applications or nature studies. Four hundred year ago, during the winter of 1609, a relatively unknown Italian scientist, Galileo Galilei designed a spyglass with two crude lenses and turned it skyward. Since then, refractors have retained their dominance over all types of reflector in studies of the Moon, planets and double stars because of the precision of their optics and lack of a central obstruction in the optical path, which causes diffraction effects in all commercially-made reflectors. Most mature amateur astronomers got started with a 60mm refractor, or something similar. Thirty years ago, there was little choice available to the hobbyist, but in the last decade long focus crown-flint achromats have moved aside for some exquisitely crafted apochromatic designs offered by leading commercial manufacturers. There has been a huge increase in the popularity of these telescopes in the last few years, led by a significant increase in the number of companies (particularly, William Optics, Orion USA, StellarVue, SkyWatcher and AstroTech) who are now heavily marketing refractors in the amateur astronomical magazines. In Choosing and Using a Refracting Telescope, well-known observer and astronomy writer Neil English celebrates the remarkable history and evolution of the refracting telescope and looks in detail at the instruments, their development and their use. A major feature of this book is the way it compares not only different classes of refractor, but also telescopes of each class that are sold by various commercial manufacturers. The author is perhaps uniquely placed to do this, having used and tested literally hundreds of different refracting telescopes over three decades. Because it includes many diverse subjects such as imaging with consumer-level digital cameras, imaging with webcams, and imaging with astronomical CCD cameras – that are not covered together in equal depth in any other single volume – Choosing and Using a Refracting Telescope could become the ‘refractor bible’ for amateur astronomers at all levels, especially those who are interested in imaging astronomical objects of every class.
Author: Richard Anthony Proctor
Publisher:
ISBN:
Category : Astronomy
Languages : en
Pages : 146
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Book Description
