Artemis II Wet Dress Rehearsal: Core Stage Liquid Hydrogen in Topping Mode
via nasa.gov
Short excerpt below. Read at the original source.
NASA teams have completed filling the core stage of the SLS (Space Launch System) rocket with liquid hydrogen and transitioned to topping mode. Topping ensures the tank reaches its full capacity with super-cold liquid hydrogen chilled to minus 423 degrees Fahrenheit. Engineers continue to watch the leak at the interface of the tail service mast […]