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As part of the Artemis II wet dress rehearsal, NASA’s Artemis II closeout crew and pad rescue team are en route to Launch Pad 39B. The closeout crew will head to the White Room inside the crew access arm on…
NASA teams have transitioned all cryogenic tanks on the SLS (Space Launch System) rocket to replenish mode during the Artemis II wet dress rehearsal. This includes both liquid hydrogen and liquid oxygen tanks for the core stage and the interim cryogenic propulsion stage. Engineers continue…
NASA astronaut Chris Williams will connect with students in Pennsylvania to answer prerecorded science, technology, engineering, and mathematics (STEM) questions while aboard the International Space Station. The Earth-to-space call will begin at 12:20 p.m. EST Thursday, Feb. 5, and will…
Following the vent and relief test on the interim cryogenic propulsion stage (ICPS) liquid hydrogen tank, NASA teams have entered the topping phase of fueling liquid hydrogen. The vent and relief test verifies that the vent and relief valves operate correctly to maintain…
Fueling of the SLS (Space Launch System) rocket is proceeding on all fronts, following earlier pauses on liquid hydrogen flows. Liquid hydrogen and liquid oxygen in the core stage are in the replenish phase. Liquid oxygen has also reached the…
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…
Editor’s note: This blog post was updated at 4:09 p.m. EST on Feb. 2, 2026, to correct the status of liquid hydrogen operations at the time of posting. Ground teams have resumed loading liquid hydrogen operations into the core stage…
The Expedition 74 crew kicked off the week with SpaceX Dragon spacecraft preparations and science hardware maintenance ensuring research continues providing pristine results aboard the International Space Station.
After teams temporarily resumed fast fill of liquid hydrogen operations into the core stage, initial steps to correct the leak proved unsuccessful. The leak rate at the interface of the tail service mast umbilical continued to exceed the allowable limits.…
Teams have started chilling down the lines used to feed liquid oxygen into the upper stage. Troubleshooting of liquid hydrogen loading into the core stage continues.
