What Happened
NASA has begun loading fuel into the Artemis II rocket ahead of a planned launch from Florida on Wednesday, setting the stage for the first crewed mission to lunar orbit in more than 50 years. The fueling operation involves liquid hydrogen and liquid oxygen, both of which must be handled with extreme precision because of their supercold temperatures.
The launch is scheduled for 6:24 p.m. local time from Kennedy Space Center at Cape Canaveral, with a two-hour launch window available. The Space Launch System, or SLS, is now on the pad with the Orion capsule, which will carry four astronauts toward the Moon.
Why the Fueling Step Matters
Loading fuel into the SLS is one of the most delicate parts of the countdown. The process begins with cooling the pipes to prevent sudden temperature changes from damaging the system, then moves into a slow fill before ramping up to full loading speed. By the end of the operation, the rocket’s central stage will hold more than 2.6 million liters of supercold liquid oxygen and liquid hydrogen.
A key decision point comes at 10:50 a.m. local time, when the launch team will determine whether to continue fueling if leaks or other problems appear. The mission was already delayed twice in February because of leaks and helium supply issues, making this phase especially important for staying on track.
The Crew and the Mission
Artemis II will carry NASA astronauts Reid Wiseman, Christina Koch, and Victor Glover, along with Canadian Space Agency astronaut Jeremy Hansen. If the launch goes ahead, they will become the first humans to travel to lunar orbit since Apollo 17 in 1972.
The flight is expected to last 10 days and will send the crew around the Moon, including views of the far side of the lunar surface. The mission is also set to become the farthest crewed journey from Earth in history, surpassing the distance reached by Apollo 13.
What It Means
Beyond its technical goals, Artemis II marks a major step in the return of human exploration beyond low Earth orbit. It will also open a more diverse chapter in lunar exploration by including the first woman, the first Black astronaut, and the first Canadian on a mission to the Moon.
NASA has multiple backup launch opportunities through April 6 if a delay is needed. The countdown now turns on whether the fueling process and final checks can proceed without interruption.