https://phys.org/news/2018-07-nasa-revival-moon-glory-days.html > Now, NASA is struggling to redefine itself in an increasingly crowded field of international space agencies and commercial interests, with its sights set on returning to deep space. > These bold goals make for soaring rhetoric, but experts worry the cash just isn't there to meet the timelines of reaching the moon in the next decade and Mars by the 2030s.