The Cologne Commentary on Space Law (CoCoSL) is a three-volume annotation on the norms of space law as contained in the Treaties of the United Nations and its General Assembly Resolutions. As a joint publication of the Institute of Air and Space Law of the University of Cologne and the German Aerospace Center (DLR), the commentary brings together the scientific and academic proficiency of the Institute and the practical and technical capacity of DLR. It constitutes essential reading for all academics, practitioners and technicians working in the field of space law and beyond.