NASA delays final test for moon shot

NASA's Space Launch System rocket at launch pad 39B at  the Kennedy Space Center in  Florida in March 2022
NASA's Space Launch System rocket at launch pad 39B at the Kennedy Space Center in Florida in March 2022.

The latest test of NASA's giant Moon rocket SLS has been suspended to allow for a SpaceX rocket to launch later this week, the US space agency announced Tuesday.

The dress rehearsal for the giant Space Launch System is taking at launch pad 39B at Cape Canaveral, Florida—where SpaceX is scheduled to lift off from pad 39A on Friday.

The test of the rocket, which is to return humans to the Moon, is now expected to resume shortly after the take-off of the SpaceX flight, which is to carry three businessmen and a former astronaut to the International Space Station.

The 322-foot (98 meters) SLS rocket will remain on its launch pad while waiting.

In this final test before blast-off for the Moon later this year, all the steps leading up to launch must be rehearsed, from filling the tanks to the final countdown, which will be stopped just before the engines fire.

The run-through started last Friday and was originally scheduled to last two days, but was extended after NASA teams encountered "a whole myriad of technical challenges" as well as uncooperative weather on Saturday, said Mike Sarafin, the mission manager for the Artemis Moon landing.

Among the problems encountered were four lightning strikes hitting the launch pad during a thunderstorm, which at least proved that the protection system had worked as planned.

But the problems were not "major issues," Sarafin said. "We haven't run into any fundamental design flaws or design issues."

"We take pride in learning from these tests," he said, calling the ones already carried out in recent days "partially successful."

Artemis 1 will mark the first flight of the SLS, whose development has lagged years behind schedule.

The Orion capsule at its top will be propelled to the Moon, where it will be placed in orbit before returning to Earth.

The first mission will not have astronauts on board. The take-off date is to be announced after the so-called "wet" dress rehearsal.

A launch window is possible in early June, and Sarafin said he was "not ready to give up on it yet."

Another launch window is possible in early July.


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