Astronomy
Deep-sky Observer's Companion: Tutorial
Posted on January 01 @ 12:00 by Auke Slotegraaf - filed under Astronomy
Two hundred years ago astronomers were mainly preoccupied with the globe on which they lived and the solar system of which it was a member. Consequently, only nineteen objects outside the solar system were known. Today, hundreds of thousands of objects have been discovered that lie beyond our solar system and are known collectively as deepsky objects. This appellation covers clusters of stars, nebulae and the galaxies. These distant worlds are the objects of study for the deepsky observer.
For the beginner, observing the deep sky requires time, patience and a willingness to learn. A small telescope will reveal hundreds of objects to the skilled observer, and many thousands are within reach of a modest telescope.
Through practice and experience, anyone can master the art of deep-sky observing. There are a wealth of deep-sky objects awaiting your scrutiny.
Observational astronomy is to a great extent an aesthetic pursuit. Enjoy the view as you explore the night sky, but in doing so, do yourself one favour: don't rush. As you move from one target to the next, pause a while. Don't just look at the universe – see the universe. Hopefully this guide will point you in the right direction as you start your journey of discovery.
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This 47-page tutorial is a compilation of what skilled observers have written and said about their experiences. It discusses the basic and not-so-basic techniques of observing our Universe beyond the solar system. Whether you have binoculars or a telescope, this guide provides the background you'll need to start observing.
Topics covered include: observing equipment, planning your observing session, observing techniques, the art of visual observing, astronomy and vision, the atmosphere, weather, & seeing, selecting an observing site, the deep-sky catalogues of Lacaille, James Dunlop, John Herschel, Dreyer’s NGC, Jack Bennett, and the obscure list drawn up at the Royal Observatory, Cape of Good Hope. Appendices detail these catalogues, as well as listing abbreviations sometimes used in deep-sky descriptions, a short piece on star colours, and an extensive reference list for further reading.
Keywords: Astronomy, deepsky observing, deep sky observing, Deepsky Observing Companion tutorial, DOC
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