NASA is introducing the four astronauts of the next Artemis moon program mission on Tuesday. The announcement at the Johnson Space Center in Houston kicks off a year or more of mission-specific training for the Artemis III crew.They are expected to launch into Earth orbit next year to test rendezvous and docking procedures with moon landers being built by SpaceX and Blue Origin — a critical milestone before the U.S. can send astronauts back to the moon for landing in 2028.What the Artemis III mission will doThe Artemis III crew will need to master the same operations that will be...