欧洲人发现,在哥伦布空间站对接舱投入使用之前,再入回收密封舱可用来提供微重力试验飞行条件。已经提出了几种用于欧洲“过渡飞行器”计划的方案,其中有些方案即使得不到有关部门的投资,也可能通过商业途径研制出来。美国航宇局也将开始设计自己的再入回收密封舱,目前正在评估2月份收到的4种有吸引力的方 Europeans have discovered that a re-entry airtight capsule may be used to provide microgravity test flight conditions prior to commissioning the Columbarium docking station. Several proposals have been made for the European “transitional aircraft” program, some of which may have been commercially developed, even without the investment of the departments concerned. NASA will also start designing its own re-entry airtight capsule and is currently evaluating the four attractive parties it received in February