NASA announced today that it has successfully repaired a valve inside the propulsion system of the SLS Core Stage. Having repaired it, teams at NASA’s Stennis Space Center can move on with further tests.

This week, the team is preparing for the seventh Green Run test, called the wet dress rehearsal, when the stage will be loaded with cryogenic, or super-cold, propellant for the first time. NASA is now targeting the week of Dec. 7 for the wet dress rehearsal and the week of Dec. 21 for the hot fire test. During the hot fire test, all four engines will fire to simulate the stage’s operation during launch. The Green Run test series is a comprehensive test of the rocket’s core stage before it launches Artemis missions to the Moon. NASA remains on track to launch Artemis I by November 2021.

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