2015年5月29日,美国航天新闻网刊登文章称,NASA正在制定计划,准备在本世纪20年代开展一系列地月空间载人航天任务,为后续的火星探测及登陆任务做准备。这些计划将测试绕月任务的居住舱及其他技术,任务周期从几周到1年不等。NASA为“猎户座”飞船与“空间发射系统”(SLS)运载火箭规划了一系列任务,最后一个已 On May 29, 2015, NASA published an article stating that NASA is making plans to launch a series of Earth-space manned space missions in the 1920s to prepare for the subsequent Mars exploration and landing mission. These plans will test living quarters and other technologies around the moon mission, ranging from weeks to one year. NASA planned a series of missions for the “Orion” spacecraft and “space launch system” (SLS) launch vehicle, the last of which