This thesis analyses the biggest issues and gaps that affect current Life Cycle Assessment (LCA) practices in the space sector. It addresses how the difficulty in collecting data affects the results of the studies, indicating how an information-sharing framework, supported by the right set of laws and acts, could benefit all users. Future changes affecting launcher architectures, and therefore Life Cycle Inventory (LCI) databases, are also discussed. The document then defines the steps that need to be included when determining the impact due to the testing and propellant combustion of a launcher. Moreover, it includes the modelling, based on data collection from available off-the-shelf products, of the main components usually found in a launch vehicle.