The rocket is called SLS, is as tall as a 32-story building and weighs approximately 3,000 tons.

This monster will accelerate a space capsule so that it can break away from the Earth's gravity and reach the moon after traveling at about 40,000 kilometers per hour.

The first flight is unmanned.

All systems must be tested in space for a few weeks.

On board are three mannequins in human size – and a screw from the Apollo 11 spacecraft, which made the first moon landing in 1969.

Overpriced

The new SLS launch vehicle is slightly heavier than the Saturn rockets that sent American men to the surface of the moon in 1969-72.

But now four people can be accommodated on board instead of three.

The engines are more powerful.

Above all, the flow of information is completely different from 50 years ago.

The Orion capsule's computers are about 20,000 times faster than those on board in 1972, the memory capacity is 128,000 times greater.

The Artemis project is delayed and significantly overpriced, which is common in these contexts.

Start was planned for December 2016, but technical concerns and rising costs have slowed the project.

Amazon CEO and owner Jeff Bezos' space company Blue Origin wanted to build the lunar lander but was not awarded the contract by Nasa.

It instead went to multi-billionaire and businessman Elon Musk's company SpaceX.

Then the Bezos company sued Nasa and there were further delays.

The first Artemis launch is estimated to cost roughly four billion dollars.

Many tours

At the end of August this year, everything was finally ready for Artemis 1. Then leaking hydrogen was seen from the rocket.

After unsuccessful attempts to fix the problem on the spot, another "scrub turn-around" followed, space slang for "brush clean, one more turn", which the Americans usually say when they have to cancel.

Then came a threatening hurricane and the rocket had to be wheeled back into the shelter of a large hangar.

But early on Wednesday morning Swedish, it is finally time for postponement.

Artemis 2, the next flight, is scheduled for May 2024 and then there will be people on board.

The third Artemis launch has landing on the moon as the final goal.

Then it must be with a woman and a "person of color", as the state-run American space company Nasa wrote in its goals for the project.