Despite a new valve issue, NASA says it’s ready to proceed with the next stage of testing the megarocket that will send the uncrewed Artemis 1 mission to the moon in November. 

Initially, the Space Launch System (SLS) rocket performed well during the series of “green run” tests this fall. That said, ground equipment problems held up the final “wet dress rehearsal” procedures until late in December, when NASA was trying to fill the core stage with fuel.