This edited book focuses on how States should regulate activities in space and explores strategies to advance State responsible behaviour to ensure sustainable use and effective protection of outer space for peaceful purposes. The time seems ripe to bring international law into the space sustainability discourse. The concept of sustainable development was conceptualized by the 1987 Brundtland Report, Our Common Future. Today, as then, the overlap between the security, environmental and economic dimensions, including in terms of intra/inter-generational equity, is reflected within the current 'new space' era that is now 'our common future'. This edited book collects original theoretical and empirical contributions. It contributes to unpack the international outer space regulatory framework in the light of current trends and pressing challenges. This offers a unique perspective and guidance thus empowering regulatory strategies for stakeholders and end-users, i.e., scholars, policy-makers, industry and society.