NASA has about three weeks to complete repairs to the Space Launch System’s upper stage to make the next launch window for the Artemis 2 mission.

NASA's Artemis II rocket repairs are underway after a dislodged seal caused a helium flow issue, delaying launch.

After NASA announced a helium flow issue in the rocket, SLS has returned to the VAB. This further delayed the launch of ...

NASA has selected the Centaur upper stage currently used on United Launch Alliance’s Vulcan rocket for future flights of the Space Launch System.

A failure in the helium flow of the SLS rocket has prompted NASA to delay the Artemis II moon mission. Rather than March 6, ...

The pressure to fix SLS and get to a launch for Artemis 2 will build. If there is another rollback in April or new leak or valve issue in May or long repairs.

Jared Isaacman, the agency’s administrator, said the Artemis III mission would move to 2027 and would no longer attempt a lunar landing.

Technicians swapped seals at the launch pad after hydrogen gas leaked from the rocket’s main fueling line earlier this month. This time, the seals held. “For the most part, those fixes all performed ...

(Update: With extreme cold set to reach Florida overnight Jan. 31, NASA has delayed wet dress rehearsal until no earlier than Feb. 2, and launch is now no earlier than Feb. 8.) With the giant SLS ...

NASA's Artemis II mission, the first crewed journey around the Moon in over fifty years, has been delayed due to a helium flow anomaly in the Space Launch System rocket's Interim Cryogenic Propulsion ...

The two biggest commercial space companies are stepping up.