How did all these things get up there? And what will happen to them when humans return to the moon? Pragmatists like Harrison Schmitt – the most recent astronaut to walk on the moon – see ...
These objectives "will inform our exploration plans at the moon and Mars for the ... Earth to the Martian surface," like human habitats. Beyond this, NASA must figure out a way to develop and ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback