Move crews at NASA’s Michoud Assembly Facility in New Orleans lift the aft dome for the liquid hydrogen tank for the fourth core stage of NASA’s SLS (Space Launch System), into the in-feeder of the facility’s vertical assembly center. Once loaded into the production tool, teams with SLS prime contractor, Boeing, will circumferentially friction-stir weld the dome to the previously-welded forward dome and five barrels that make up the liquid hydrogen tank. The SLS core stage liquid hydrogen tank holds 537,000 gallons of super-cooled propellant and is one of five unique elements that make up the SLS core stage. Together with the forward skirt, liquid oxygen tank, intertank, and engine section, the liquid hydrogen tank will provide propellant to the four RS-25 engines to produce more than two million pounds of thrust to help launch NASA’s Orion spacecraft, astronauts, and supplies beyond Earth’s orbit to the Moon. Image credit: NASA/Michael DeMocker