据麦克唐纳·道格拉斯航宇公司为NASA马歇尔空间飞行中心进行的一项研究表明,一种永久性的载人空间站可能于1990年研制成功并在近地轨道投入使用。设计研究表明,积木式的载人空间平台所需硬件的大部分技术可以从其他空间计划(如空间实验室、航天飞机和天空实验室)的基础上修改成适合于未来空间站的技术。麦克唐纳·道格拉斯公司最初接受了一项合同,旨在评价一个无人 According to a study by McDonnell Douglas Aerospace Corporation for the NASA Marshall Space Flight Center, a permanent manned space station could be successfully developed in 1990 and put into service in near-Earth orbit. Design studies show that much of the technology for the hardware required for a modular manned space platform can be adapted from future space stations based on other space programs such as space labs, space shuttles and sky labs. McDonnell Douglas initially accepted a contract to evaluate a nobody