By Stephen James O'Meara
The Herschel four hundred is an inventory of four hundred galaxies, nebulae, and celebrity clusters, picked from over 2,500 deep-sky gadgets found and catalogued through the nice 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 shiny nebulae. during this consultant Steve O'Meara takes the observer in the course of the checklist, season by means of season, month via month, evening through evening, item via item. He works during the gadgets in a gently deliberate and methodical approach, taking in probably the most dramatic non-Messier galaxies, nebulae, and big name clusters within the evening sky. excellent for astronomers who've tackled the Messier items, this richly illustrated consultant may help the novice astronomer hone their watching abilities.
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