NETS 2011 contains 87 full papers with topics ranging from Missions and Architectures, Fission Power and Propulsion, Radioisotope Power Systems, Nuclear Thermal Propulsion, and Advanced Concept. There was also an Opening Plenary, A Plenary Session on Science Missions Enabled by Nuclear Power and Propulsion and a Special Session on Addressing the Non-Technical Challenges of Developing Space Nuclear Technology: Navigating the World of Politics and Policy.