By Stephen James O'Meara
The Herschel four hundred is an inventory of four hundred galaxies, nebulae, and big name clusters, picked from over 2,500 deep-sky gadgets found and catalogued via the good eighteenth-century astronomer Sir William Herschel and his sister Caroline. It contains 231 galaxies, 107 open clusters, 33 globular clusters, 20 planetary nebulae, 2 halves of a unmarried planetary nebula, and seven shiny nebulae. during this consultant Steve O'Meara takes the observer in the course of the record, season through season, month by means of month, evening by way of evening, item by means of item. He works in the course of the gadgets in a delicately deliberate and methodical means, taking in essentially the most dramatic non-Messier galaxies, nebulae, and megastar clusters within the evening sky. perfect for astronomers who've tackled the Messier gadgets, this richly illustrated consultant may also help the beginner astronomer hone their staring at abilities.
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