This volume contains the proceedings of the 61st Colloquium on the Law of Outer Space held in Bremen, Germany in October 2018, as well as the papers presented at the IISL-ECSL Space Law Symposium The 50th Anniversary of the Rescue and Return Agreement: Relevance and Challenges held on the occasion of the 57th Session of the Legal Subcommittee of the UN Committee on the Peaceful Uses of Outer Space in Vienna, Austria in April 2018, and the report of the 13th Eilene M. Galloway Symposium on Critical Issues in Space Law, held in Washington D.C., United States in December 2018. It also contains the report and best written memorials of the World Finals of the 27th Manfred Lachs Space Law Moot Court Competition held in October 2018.