By Stephen James O'Meara
The Herschel four hundred is a listing of four hundred galaxies, nebulae, and big name clusters, picked from over 2,500 deep-sky gadgets stumbled on and catalogued via the good eighteenth-century astronomer Sir William Herschel and his sister Caroline. It includes 231 galaxies, 107 open clusters, 33 globular clusters, 20 planetary nebulae, 2 halves of a unmarried planetary nebula, and seven vivid nebulae. during this consultant Steve O'Meara takes the observer in the course of the checklist, season through season, month by means of month, evening through evening, item through item. He works throughout the gadgets in a delicately deliberate and methodical manner, taking in essentially the most dramatic non-Messier galaxies, nebulae, and big name clusters within the evening sky. perfect for astronomers who've tackled the Messier items, this richly illustrated consultant may help the novice astronomer hone their looking at talents.
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