Space activities have their origin in the development of V2 rockets by Nazi Germany in the last century. The relative novelty of this activity means that there has been little retrospective focus on the diversity of heritage created by this adventure. However, space’s heritage remains to be discovered, invented and protected. He asked about our cultural identity, our intellectual silos and the very nature of heritage. Fuelled by long-standing problems, rich in transnational exchanges, it has also been built on a wide range of disciplines. Only a few of its traces can now be found in the collections of museum institutions. The CNES (National Centre for Spatial Studies) Space Observatory has, for the past two years, launched a first inventory of the instrumental component of this heritage. The corpus thus formed reveals the richness of the problems. A comprehensive approach would lead to a better definition of space heritage and perhaps to the emergence of the concept of space’s cultural heritage, which is conducive to many historical and sociological considerations. The anchoring of space adventure in a collective imagination, its understanding by the wider audiences and, finally, the future development of space activities are all issues that can only be fully understood in the light of this heritage ownership.