Aiming to kick off the Artemis era later this year, NASA is preparing for the first launch of its Space Launch System (SLS) mega-rocket carrying the Orion spacecraft, which will fly without any crew around the Moon and back on a trip lasting between 26 and 42 days. NASA hopes this Artemis 1 mission will be a steppingstone to its next giant goal, landing astronauts at the lunar south pole by the...