As has been stated in the replies to previous questions, space law must prevail with regard to the flight of an aerospace object during all the phases of its movement, that is, from the time the object takes off (from the Earth or from a platform) until it arrives at its destination (entry into orbit or landing).
Il est possible de répondre par l'affirmative à la première partie de cette question s'agissant d'objets aérospatiaux qui seraient capables de servir à des fins tant aéronautiques qu'astronautiques.