Where will NASA astronauts go next?

摘要

Nasa has a problem. It doesn't have the money to complete its current human space-flight plan, which is meant to return people to the moon by 2020. And the Ares I rocket it is building to replace the space shuttle is not likely to be ready until 2017, although the International Space Station it is supposed tornservice is due to be tossed into the Pacific Ocean in 2016.