Navigating Superpower Dominance: The Role of Mid-Sized Nations in Global Space Governance, with the United Kingdom as a Case Study

This paper explores the evolving nature of international space governance by analysing both the power dynamics between leading spacefaring nations, namely the United States (US), China, Russia and India, and whether mid-sized states hold influence over the progression of space activity, using the United Kingdom (UK) as a case study.Whilst space superpowers maintain leadership through technological, military and economic superiority, the increasing commercialisation of outer space has challenged traditional state-dominated space activity. This paper assesses the dynamics between state and commercial actors, and whether commercialisation has widened the capability gap between spacefaring nations. Heightened political rivalries, exacerbated by lunar ambitions, have increased the risk of space militarisation. This paper investigates whether mid-size nations can act as moderating players in geopolitical tension through diplomacy, policy leadership and sustainable practices. The UK’s approach, seen in initiatives like the Astra Carta, participation in the Artemis Accords, and active role within the United Nations, illustrates how strategic diplomacy allows states with limited military and launch capacity to influence global space policy. The paper is structured in three parts. First, it assesses the ambitions and strategies of dominant spacefaring nations. Second, it considers the risks of disproportionate governance and the strategies implemented by mid-sized powers to assert influence through regulatory frameworks, multilateral diplomacy and technological specialisation. Finally, it evaluates future trends for global space governance in light of growing commercial activity, the prospect of an international regulatory regime, and the challenge of equitable multi-state participation.