Teams at NASA’s Stennis Space Center performed a wet dress rehearsal exercise with the new Space Launch System core stage Dec. 20, 2020. The test – the seventh in an eight-test Green Run series – involved rehearsal of a countdown to hot fire of the stage’s engines, including the loading of 733,000 pounds of liquid hydrogen and liquid oxygen propellants. This image shows liquid oxygen as it naturally boils off and is vented from the four RS-25 engines that will be fired during the final core stage test.
Album SLS-Core-Stage-Wet-Dress-Rehearsal
Location Stennis Space Center