基本説明
This work is the fruit of research carried out by the French Centre national d'etudes spatiales during the ten last years, in collaboration with many organziaton, astronautical or not: ESA, NASA and especially ESPI.
Full Description
2011: fifty years separate us from the flight of Yuri Gagarin. This work is the fruit of research carried out by the French Centre National d'Etudes Spatiales (CNES) over the past ten years, in collaboration with many organisations, astronautical or not: ESA, NASA and especially ESPI.
