The one book no stargazer should be without, the fully updated 2013 edition of this essential guide features a range of specially commissioned articles by some of the world's top astronomers, an authoritative collection of charts and astronomical data, and a special picture section featuring some of the most important astronomical events of the year. It also includes a month-by-month guide to events in the coming year: planets, eclipses, comets, meteors, nebulae and phases of the moon.