A concise month-by-month calendar for star watchers in the northern hemisphere. Star charts show the position of stars, constellations and other celestial objects for each month of the year, in both northerly and southerly directions. The introduction explains the basic facts and observers need to know: the apparent motions of the stars, seasonal changes, star brightness, the nature of the Milky Way, and how the night sky is represented on maps. In addition, location tables are provided for the four planets bright enough to be seen easily from the Earth with the naked eye: Venus, Mars, Jupiter and Saturn. The principal lunar features are also indicated on a pair of photographs showing the Moon at first quarter and at last quarter.