美国国家航宇局已经成立了一个新的计划办公室 ,负责新一代重复使用火箭的研制管理工作。这种新型火箭将比现在的火箭安全得多 ,而且成本将大大降低。按照计划 ,这种火箭将于 2 0 10年开始飞行。设立在航宇局马歇尔航天飞行中心的第 2代重复使用火箭计划办公室是航宇局“航天发 NASA has set up a new planning office to take charge of the development and management of a new generation of reused rockets. This new rocket will be much safer than the current rocket, and the cost will be greatly reduced. It is planned that the rocket will begin its flight in 2010. The 2nd Generation Reusable Rocket Program Office established at NASA’s Marshall Space Flight Center is NASA’s Space Shuttle