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!
本站所有内容均为互联网搜索引擎提供的公开搜索信息,本站不存储任何数据与内容,任何内容与数据均与本站无关,如有需要请联系相关搜索引擎包括但不限于百度,google,bing,sogou 等
© 2026 onlinetoolsland.com All Rights Reserved. 本本书屋 版权所有