NASA seeks a sustainable moon program. In the past, Apollo lunar landings were direct trips from and back to Earth. The goal now is to have a base with astronauts near the moon.

NASA希望其月球项目能够可持续进行。以前，阿波罗的月球着陆都是月地直接往返的。现在的目标是让宇航员在月球附近有一个基地可用。