This star atlas and reference has been updated to take account of developments in observational astronomy. The star maps have been plotted using computer techniques which provide a high level of accuracy, and the maps show all the stars visible to the naked eye under the clearest skies, as well as other objects such as star clusters, nebulae and galaxies. The maps are divided into sections and are accompanied by lists of objects of interest, and the handbook section has been updated to include observing tips, explanations of technical matters and reference information.