English: NASA has completed assembly of the upper, or forward, part of the core stage for the Space Launch System (SLS) rocket that will send the Artemis II crew on their lunar mission. Boeing, the lead core stage contractor, completed joining the forward part of the rocket, and then lifted it out of the assembly structure at NASA’s Michoud Assembly Facility in New Orleans. To construct this part of the core stage, the team first stacked three major parts of the stage—the forward skirt, the liquid oxygen tank, and the intertank. The forward skirt sits atop the rocket’s core stage, and it and the intertank are outfitted with the rocket’s flight computers and avionics systems that control SLS during launch and ascent. The liquid oxygen tank holds 196,000 gallons of liquid oxygen cooled to minus 297 degrees Fahrenheit. The entire upper part of the stage is around 66-feet tall. The fully-assembled, 212-foot-tall rocket stage consists of five hardware elements. As the team lifted it out of the assembly area, they completed a breakover maneuver, to put the forward assembly in a horizontal position. Then, they moved it to final assembly where the Artemis II liquid hydrogen tank is also undergoing outfitting. Here, teams will connect the liquid hydrogen tank to the upper part of the rocket and complete assembly of four of the five core stage parts. The last piece to be added will be the engine section, which is currently in a separate assembly area being outfitted with propulsion systems that connect to the engines. Image credit: NASA/Michael DeMocker