Armed Conflicts in Outer Space

The paper critically explores those scenarios (hypothetical, but probable) in which armed conflicts take place in outer space. First, the problem regarding the definition and delimitation of outer space will be analyzed. In this regard, the reasons why there is no consensus among the States, and even within the scientific community, will be explained. Subsequently, the relevant branches (for the topic) of Public International Law will be introduced (International Space Law, International Humanitarian Law, and Ius ad Bellum) and their key regulations will be identified. At this point, the main reasons why International Humanitarian Law shall be applied in the event that an armed conflict develops in outer space will be explained taking into account PIL formal and auxiliary sources. Likewise, specific challenges, that result from the application of International Humanitarian Law in outer space, will be exposed and analyzed. These challenges include: (i) attacks on dual-use objects; (ii) the obligations of the parties to the conflict when there is human direct or physical participation; and (iii) the applicable regulations for the development and use of new weapons. For each problem raised, possible solutions based on the rules and principles of current law will be provided. Finally, the need for the eventual creation of a specific treaty to regulate the matter will be emphasized, in view of the unique nature of this type of conflict.