NASA teams have completed final preparations and closeouts of the umbilicals connecting the mobile launcher to the SLS rocket and Orion spacecraft. The umbilicals provide power, communications, and fuel to different parts of the rocket and spacecraft, while additional accessories provide stabilization.
9:35 a.m.
At approximately 9:27 a.m., the Artemis launch director gave the “go” to begin loading cryogenic liquid propellant into the SLS rocket.
9:40 a.m.
Teams have started chilling down the liquid hydrogen and liquid oxygen lines for the SLS rocket’s core stage. This critical step cools the propellant lines ahead of loading super-cold liquid hydrogen and liquid oxygen into the core stage tank, which will eventually hold more than 700,000 gallons of liquid hydrogen and liquid oxygen.
More on NASA’s blog.
