We are witnessing a new golden age of space conquest. During the Cold War the United States and the Soviet Union had sought to place their space exploits in the framework of international law. Today that trend towards accountability is being reversed. Individualistic logic is prevailing and the founding principles of international space law are increasingly being put aside. Legal scholars and practitioners must now find a balance between the development of space activities funded by the private sector and the interests of all states. Responding to this challenge, this bilingual volume collects the leading contributions to the 2017 Summer Courses session of the Centre for Studies and Research in International Law and International Relations. The essays are structured around two objectives : to analyse the foundations and principles of space law since its creation, and to discern its direction over the next fifty years. Featuring original work from leading young legal scholars from around the world, this collection explores a little-known area of law and seeks to support space exploration for the benefit of all humanity.