- The space agency will verify the corrections in fuel leaks, in addition, if the test is successful, NASA engineers have a goal of September 27 to carry out the liftoff of Artemis I.

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The test begins at 115 p.m. 08:15 ET / NASA

NASA will try again today its pre-launch fuel test for the Artemis mission: so you can see it live

The first launch attempt of Artemis I took place on August 29, but was canceled due to a failure in one of the engines. On September 3 they tried again, however, a fuel transfer leak caused the mission to be aborted.

Today, September 21, NASA engineers will check if the repairs are in good condition to proceed with the 'cryogenic demonstration test'. Launch controllers will load supercold liquid oxygen and liquid hydrogen into the core stage and intermediate stage of the SLS (Space Launch System) rocket.

The mission team wants to start the test at 13:15 Spanish peninsular hours from the Kennedy Space Center (Florida), and if all goes according to plan, the test is expected to be completed today at 21:00 Spanish peninsular hours.

Artemis I currently has a scheduled launch window of September 27. Its 70-minute launch window will open later that day, and the Orion spacecraft will return to Earth on November 5. If not, NASA would try again on October 2.

DIRECT | The fuel test from NASA TV

The importance of Artemis I

Artemis I is intended to test the most powerful rocket built to date, the SLS, with which NASA plans to power manned missions to the Moon and Mars.

Although today's test has been dubbed the 'cryogenic demonstration test', it is actually the seventh wet overall test for SLS.

This first attempt to send Orion into space will serve the NASA team to verify that the spacecraft is capable of performing the necessary maneuvers, in addition, it will re-enter the Earth's atmosphere at high speeds.

The unmanned Orion test will splash down in the Pacific Ocean, but not before collecting lunar data for scientists on Earth.

On the other hand, NASA requires certain weather criteria before the SLS rocket is launched. Space Force Weather Squadron meteorologists will continue to monitor the weather before refueling, but fortunately, they predict favorable weather for the test with a 15% chance of lightning.

To ensure mission safety, the launch director will not give the go-ahead to begin tanking the rocket's core stage if the chance of lightning is greater than 20%.