Question 1. Can an aerospace object be defined as an object which is capable both of travelling through outer space and of using its aerodynamic properties to remain in airspace for a certain period of time?
问题1. 是否可将航空航天物体界定为既可在外层空间中飞行又可利用自身空气动力特性在空气空间中保留一段时间的物体？