The Artemis 3 SLS core stage stands inside the Vehicle Assembly Building's High Bay 2 at NASA's Kennedy Space Center. (Image credit: NASA) It's only been a month since NASA's Artemis 2 astronauts splashed down in the Pacific Ocean to wrap up their 10-mission around the moon, and the space agency is already readying the rocket for the next Artemis program test flight. The first stage of the Artemis 3 Space Launch System (SLS) rocket is now vertical inside NASA's cavernous Vehicle Assembly Building (VAB) at the Kennedy Space Center (KSC) in Florida, where it awaits integration with its engine section, NASA announced in an X post on Sunday (May 10). "Technicians at @nasakennedy have completed operations of lifting the largest section of the core stage for NASA’s Artemis III SLS rocket into High Bay 2," the post said.…