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975 / 5,000 For each period of the year, orientation maps are provided, indicating which constellations are in the sky in the evening. A separate map is included for each constellation, indicating the stars and deep-sky objects: star clusters, nebulae, galaxies. The most important stars, double stars, variable stars and deep-sky objects are discussed in the accompanying text. Twaalf Maanden Sterren Kijken is an indispensable guide for the novice observer. It is also a reference work with information on the most important stars, star clusters, nebulae and galaxies. Claude Doom has a doctorate in astrophysics and has conducted research into the life cycle of heavy stars and double stars. He currently teaches computer science management at KU Leuven. He was chairman of the Vereniging voor Sterrenkunde and editor-in-chief of Heelal. He regularly writes articles for Heelal and Zenit about stars, galaxies and space research.