当约翰F.肯尼迪总统发表他的著名演说,要求美国派人登上月球时,那不是他要谈的关于空间方面的全部事情。在1961年5月25日国会联席会议上致词,他还强调加速研制航天器用的核推进装置。 30年后的今天,克利夫兰市国家航空航天局刘易斯研究中心一群工程师正在议论:乔治·布什总统空间探索倡议成功的关键取决于把核火箭和让宇航员返 When President John F. Kennedy made his famous speech calling for the United States to send people to the moon, that was not all he wanted to talk about space. Speaking at the joint parliamentary meeting on May 25, 1961, he also stressed accelerating the development of nuclear propulsion devices for spacecraft. Thirty years later, a team of engineers at the NASA Lewis Research Center in Cleveland are talking about the key to the success of President George W. Bush’s space exploration initiative: backing nuclear rockets and returning astronauts