The Practical Astronomer's Deep-sky Companion is an essential item of equipment for deep-sky observers, whether they are interested in imaging or just sightseeing. This large-format full-colour book is designed to be taken out into the field during observing to provide essential detailed, concentrated information for finding and imaging interesting deep-sky objects. Organised by constellation, each spread features the most interesting objects, with images, information, position, locator maps, recommended exposure times for telescopes of various apertures, and much more!
發表於2025-02-02
The Practical Astronomer's Deep-sky Companion 2025 pdf epub mobi 電子書 下載
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The Practical Astronomer's Deep-sky Companion 2025 pdf epub mobi 電子書 下載