Fixing the Space Launch System rocket's helium pressurization problem has pushed the Artemis II launch to at least April 1.

NASA's towering Space Launch System rocket will be rolled back off the launch pad for repairs, delaying the Artemis 2 launch ...

NASA has returned its Artemis 2 moon rocket to the Vehicle Assembly Building, where engineers can diagnose and repair an issue with the vehicle's upper stage.

To fix the problem, NASA has to roll SLS and the stacked Orion spacecraft back to the Vehicle Assembly Building (VAB) at the ...

NASA’s efforts to get the Artemis II mission off the ground have stalled once again, as engineers navigate a new issue with the rocket set to launch four astronauts around the moon.

American space agency NASA said the Space Launch System (SLS) rocket and the Orion spacecraft of Artemis II are now back in the Vehicle Assembly Building (VAB).

NASA's Artemis II rocket successfully completed a major prelaunch test. The crew will now enter quarantine as potential launch dates come as early as March.

Engineers were able to fully fuel NASA's Artemis II moon rocket without any signs of leaks like the ones that derailed an earlier dress rehearsal.

Hours after holding what the space agency called a successful dress rehearsal, NASA found interrupted helium flow into the rocket, handing a significant setback to the lunar mission.

On a chilly morning at Marlboro Elementary, three eighth graders gather around a table strewn with notebooks, laptops, and a stack of planetary data sheets. They’re not just ...