A popular-science volume in the "Encyclopédie Larousse de poche" series by Thomas de Galiana, a science editor at Larousse and author of the Dictionnaire de l'astronautique. In seven chapters it offers a complete panorama of astronautics on the eve of the Apollo programme: man facing the space environment (homeothermy, acceleration, weightlessness), the rocket-vehicle (propulsion, guidance), orbit and artificial satellites (Tiros, O.A.O., re-entry and ablative shields), the Moon as a testing ground, exploration of the solar system (the Mariner and Venera probes) and a forward-looking chapter. A formulary and a bibliography round out the volume.