PARIS — NASA safety advisers say they doubt the lunar lander version of SpaceX’s Starship will be ready to support the Artemis 3 mission as planned in 2027. “The HLS schedule is significantly challenged and, in our estimation, could be years late for a 2027 Artemis 3 moon landing,” Hill said. A major issue, he said, is demonstrating cryogenic propellant transfer, needed to refuel Starship in low Earth orbit before heading to the moon. “Any delay in the delivery of these programs places the planned lunar landing in jeopardy of postponement and/or significant delay,” he said. He added that the panel will continue reviewing the Starship HLS program, including a “thorough factfinding” of the design and its use of cryogenic propellant transfer, at future meetings.