NASA's megarocket is back in its giant garage after completing a mission-critical dress rehearsal at the launchpad for its first voyage to the moon.. Credit: NASA/Maddison Tuttle NASA's megarocket is ...

NASA's moon megarocket is going to get a heckuva lot… mega-er. Though the U.S. space agency has only completed the crewless Artemis I mission around the moon and back so far, engineers are busy ...