This book, translated from the French, constitutes a basic primer for the space age. Area by area, whether it be rockets and satellites, astronautics or space physics, men or machines, it chronicles and explains the amazing developments in space thinking of the past ten or fifteen years. It begins by defining astronautics as ""a consequence of the development of numerous associated techniques"", then goes on to tell just what those techniques---from aviation, navigation, geography, and space propulsion---are. Then it examines the many possibilities---military, economic, geographical (is the Earth really pear-shaped?) inherent in space-age travel. Chapters on how space-travelling equipment can be retrieved after return to earth, and how soon man may travel to the moon, Mars or Venus, make especially good reading. Readers will find the book written in sound, semi-technical language which presumes some knowledge of basic science, but which in no way precludes the lay reader.