The deep sky consists of unlimited clusters, nebulae and galaxies. This practical book explains how to observe and record what you see, whether you are using the simplest optical instrument or large astronomical telescopes.; Advice on which telescope to buy, how to keep it well maintained and which accessories are really needed.; Guide to how to set up and record observations.; Covers star atlases, deep sky catalogues, computer software and GO TO telescope systems.; Detailed observing lists with descriptions of the sky's best multiple star systems.; Deep sky objects listed by constellation.