The new launch window for the Artemis 1 moon rocket launch is now between 2:17 p.m. and 4:17 p.m. ET Saturday. 

Shortly before 5 a.m. ET, mission managers received a weather briefing and decided to proceed with loading propellant into the rocket. The countdown clock resumed at 7:07 a.m. ET.

There was at least a 30-minute delay after a liquid hydrogen leak was detected at 7:15 a.m. ET in the quick disconnect cavity that feeds the rocket with hydrogen in the engine section of the core stage. It was a different leak than one that occurred ahead of the scrubbed launch on Monday.

NASA controllers warmed up the line in an attempt to get a tight seal and the flow of liquid hydrogen resumed before a leak reoccurred. They stopped the flow of liquid hydrogen, “closed the valve used to fill and drain it, then increased pressure on a ground transfer line using helium to try to reseal it,” according to NASA.

To make a long story short, the plan was not successful and the team is evaluating another plan. What has happened so far has put the launch of the rocket behind schedule, but it’s unclear how much of a delay it will cause in the countdown because they may be able to make up some time later.

If the mission launches on Saturday, it will go on a journey around the moon and splash down in the Pacific Ocean on October 11. There is still a backup opportunity for the Artemis I mission to launch on September 5 as well.