Observing the deep sky, beyond the limits of our Solar System, is by far the most popular speciality for amateur astronomers. In addition to cataloguing over 500 of the best deep-sky targets for amateur astronomers, the Concise Catalog of Deep-sky Objects adds a unique dimension by including fascinating facts about every object listed. For the first time, amateur astronomers at every level have an easy reference source that not only tells them what to look for, but also describes just what it that they are seeing!
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