This edited volume offers a multidimensional analysis of the evolving geopolitics, strategic competition, and legal frameworks shaping outer space in the 21st century. It positions space as a contested domain central to the security, economy, and strategic behaviour of states. Through comparative case studies and theoretical innovation, the book examines how major and emerging powers compete for influence beyond Earth's atmosphere. It explores how perspectives on governance, militarisation, and the entanglement of commercial and military interests are reshaping the domain. By integrating strategic studies, international relations, space law, and regional dynamics, this interdisciplinary volume lays the groundwork for a geopolitical approach to power in the Solar System. Structured around national and regional analyses, the chapters investigate issues such as deterrence, escalation control, and space policy. They also assess governance initiatives, commercial ventures, and technological developments, highlighting implications for cooperation and competition. This analysis equips policymakers and scholars with insights into the evolving nature of competition, conflict, and the need for adaptive strategies in the space domain.

Marko Filijovic is a geopolitical and security expert specialising in extraterrestrial geopolitics, governance, and outer space resources, alongside Arctic dynamics and global security. He is currently a Geopolitical and Special Advisor at Riley Risk Inc. and consults for private sector clients, including Valinor Intelligence and London Politica. Marko has extensive experience in geopolitical risk analysis, strategic advisory, and policy research. He holds a PhD in Security Studies from the University of Belgrade and has authored over 70 academic publications. Samuel Jardine is a geopolitical consultant and historian specialising in strategic competition, governance, and risk management, particularly for space, the Arctic, Antarctic, and seabed. He is currently Head of Research at London Politica, the Senior Policy Lead at the Open Lunar Foundation, and a Research Associate for Oxford University and CHACR's Climate Change & (In)Security Project. Sam holds an MA in Modern History from King's College London, a BA(Hons) in History from the Open University and was a RUSI Military Sciences "Rising Stars" mentee.