After multiple attempts to complete a critical fueling test of its next-generation Space Launch System, NASA has decided to finish the rocket at a later date. On Saturday evening, the agency announced that it would move the SLS off of its launch pad and back to the Kennedy Space Center's Vehicle Assembly Building to give one of its gaseous nitrogen suppliers time to complete a critical upgrade. According to Space News, Nitrogen supply issues delayed two previous rehearsals.

NASA will use the opportunity to replace a faulty helium check valve and repair a minor hydrogen leak technicians found in one of the rocket's mobile launch tower. It promised to give more information about the decision during a press conference on April 18th.

NASA has tried three times to complete a wet dress rehearsal for the Artemis 1 Moon mission. When the SLS mission hopefully gets underway later this year, the test is designed to replicate the procedure that will be used. NASA tried to complete a modified version of the test on April 14th, but it was cut short after discovering a hydrogen leak in the mobile launch tower. The agency left the door open for another attempt as early as April 21st but then changed their minds.

The Artemis 1 Moon mission may be affected by the delay. NASA hasn't set a date for the flight yet, and won't until the SLS wet dress rehearsal is complete. NASA is confident that it will fly despite the issues it has run into with its next- generation rocket.