On the eve of the launch of the Artemis mission, NASA's mega-moon rocket is prepared for takeoff.

At the beginning of Monday's two-hour launch window, beginning at 8:33 a.m., there was an 80% likelihood of good circumstances, declining to 60% near the end of that time.

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NASA officials said on Sunday that all systems appeared "go" for liftoff.

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NASA has designated September 2 and September 5 as potential backup launch dates in case the countdown clock is stopped for any reason.

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"Everything to date looks good from a vehicle perspective," said Jeff Spaulding, senior NASA test director for the landmark mission, called Artemis I.

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"We are excited, the vehicle is ready, it looks great."

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Despite the fact that on Saturday during a storm, lightning rods at the launch site were struck, There are no "on the ground systems that give us any issues," according to Spaulding.

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The centrepiece of the U.S. space agency's moon programme replacement for the Apollo lunar programme of the 1960s and 1970s is the SLS-Orion combination, which is 322 feet (98 metres) tall.

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If the first two Artemis flights are successful, NASA hopes to return astronauts to the moon by 2025, including the first woman to do so.

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The two-man descent team of Apollo 17 in 1972 was the final group of humans to set foot on the moon.

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