主题：【原创】关于我国的长征5火箭 -- 李诗雅

One broad class of options involves sticking close to the original program and funding levels. But that would result in NASA building rockets to nowhere, the panel projected. NASA’s replacements for the space shuttle are the Ares 1 and its crew capsule, and a more powerful Ares 5 rocket. Ares 1 is unlikely to be ready before 2017, according to the panel. If NASA shuts down the space station in 2015, Ares 1 would have no destination.