Final preparations underway for Nasa’s Moon rocket launch

After two failed attempts this summer, NASA was busy on Monday completing final preparations for the launch of its new mega Moon rocket, now scheduled for early on Wednesday from Florida.

The Artemis 1 mission, a test flight without astronauts, represents the first step in the US space agency’s plan to build a lasting presence on the Moon, and taking lessons from there to prepare for a future voyage to Mars.

Named after the sister of Apollo in Greek mythology, the new space programme comes 50 years after humans last set foot on lunar soil.

The first launch of the Space Launch System rocket, the most powerful ever designed by NASA, is set for Wednesday at 1:04 am local time (0604 GMT), with a possible launch window of two hours.

Countdown has already begun at the storied Kennedy Space Center, where the orange and white behemoth awaits its maiden flight.

The takeoff is scheduled less than a week after the passage of Hurricane Nicole, which the rocket endured outside on its launch pad.

For now, officials are evaluating the risk associated with hurricane damage to a thin strip of caulk-like material called RTV, which encircles the Orion crew capsule atop the rocket, and makes it more aerodynamic.

Teams are looking at whether the RTV could shake loose during launch and pose problems.

Two fallback dates are possible if needed, on November 19 and 25.

But Mike Sarafin, in charge of the Artemis 1 mission, was optimistic on Sunday evening. “I feel good headed into this attempt,” he said.

The weather promises to be mild, with a 90 per cent chance of favourable conditions during the launch window.

At the end of September, the rocket had to be wheeled back to its assembly building to be sheltered from another hurricane, Ian, postponing the mission by several weeks.

Before these weather setbacks, two launch attempts had to be cancelled for technical reasons.

The first failure was related to a faulty sensor, and the second to a fuel leak when filling the rocket’s tanks. It runs on ultra-cold, ultra-volatile liquid oxygen and hydrogen.

NASA has since replaced a seal and modified its procedures to avoid thermal shock as much as possible, and succeeded in a tank filling test in late September. These filling operations are now due to begin on Tuesday afternoon, under the orders of Charlie Blackwell-thompson, NASA’S first female launch director.