A unique and necessary reference for amateurs and professionals alike, with comprehensive coverage of the thousands of celestial objects outside our solar system - but within the range of two- to twelve-inch telescopes. The objects are grouped according to the constellations in which they appear, and their definitions feature names, celestial coordinates, classification, and a full physical description, along with hundreds of charts, photographs, and other visual aids. Volume I of the three-volume work consists of an introduction and the beginning of the alphabetical list of constellations, from Andromeda to Cetus.