A collective manual published under the auspices of the Centre National d'Études Spatiales (CNES) and the Société Française d'Astronautique (SFA), written under the direction of Henri Moureu and Michel Yves Bernard by twenty specialists. Across twelve chapters in three parts, the work covers astronomy and geophysics, spacecraft technology (propulsion, atmospheric reentry, radio electronics, guidance), and space exploitation (telecommunications satellites, meteorology, navigation, and human spaceflight). An annex lists every satellite launched between 1957 and 30 January 1964. The first encyclopedic French-language synthesis of astronautics at the dawn of the French space programme.