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Artemis II Moon Rocket Begins Slow Trek to Launchpad for Historic April 1 Mission
Cape Canaveral, FL – NASA’s meticulously repaired Artemis II moon rocket embarked on a deliberate 12-hour journey back to its launchpad at the Kennedy Space Center early Friday, setting the stage for a highly anticipated April 1 launch. This mission aims to send four astronauts on a groundbreaking nine-day orbital flight around the Moon and back, marking a significant milestone in human space exploration.
The towering 332-foot-tall Artemis II Space Launch System (SLS) rocket, along with its mobile launch platform, began its glacial exit from NASA’s iconic Vehicle Assembly Building (VAB) around 12:20 a.m. EDT.
The move was delayed by approximately four-and-a-half hours due to high winds along Florida’s Space Coast. Perched atop a powerful Apollo-era crawler-transporter, the rocket’s 4-mile trek to Launch Pad 39B was expected to conclude around noon or shortly thereafter.
Upon arrival at the pad, NASA and contractor engineers will immediately commence connecting vital fuel lines, power and data cables, and prepare the pad for launch. This intricate process will involve a series of rigorous tests to ensure all connections are secure and components are functioning optimally.
NASA managers have confirmed that previous issues and repairs, which necessitated a follow-on fueling test, have been successfully resolved. The next time the SLS rocket is loaded with its more than 750,000 gallons of liquid hydrogen and oxygen propellants, it will be for liftoff.
Meanwhile, the intrepid Artemis II crew – Commander Reid Wiseman, Victor Glover, Christina Koch, and Canadian astronaut Jeremy Hansen – entered pre-flight medical quarantine Wednesday night. They are slated to arrive at the Kennedy Space Center a week from Friday, with a target blastoff at 6:24 p.m. on April 1, at the opening of a two-hour launch window.
This mission will be the first time astronauts have flown aboard an SLS rocket and an Orion crew capsule, following a successful unpiloted test flight in 2022. Unlike its predecessor, the Artemis II Orion capsule will be equipped with a full life support system. The astronauts’ first full day in space will be dedicated to thoroughly checking out the spacecraft’s propulsion, navigation, communications, and life support systems before commencing their lunar journey.
Artemis II represents the first piloted moon mission since the final Apollo crew landed on the lunar surface in 1972. While Wiseman and his crewmates will execute a circumlunar trajectory without entering lunar orbit, an on-time launch will allow them to venture farther from Earth than any humans before them.
A successful Artemis II mission will pave the way for NASA’s future plans, which include launching another SLS rocket and Orion crew next year to test rendezvous and docking procedures with moon landers currently under development by SpaceX and Blue Origin. This will be followed by at least one, and potentially two, moon-landing missions in 2028.
However, the immediate focus remains on the Artemis II crew, who must first demonstrate the rocket and Orion spacecraft’s capabilities with a triumphant journey to the Moon and back.
The mission was initially scheduled for early February but faced delays after hydrogen fuel leaks were detected during a dress rehearsal countdown. This issue was resolved at the pad, and the rocket successfully completed a second fueling test without major complications, setting the stage for a launch around March 6.
A subsequent problem arose when engineers were unable to pump high-pressure helium back into the SLS rocket’s upper stage. Pressurized helium is crucial for pushing propellants to engines and for cleaning and drying tanks and propellant lines. Unlike the initial leak, this issue required the entire SLS rocket to be transported back to the VAB for access to the second stage.
The helium problem was quickly traced to out-of-place seals in a quick-disconnect fitting and promptly repaired. Engineers also took the opportunity to replace batteries in the rocket’s self-destruct system, recharge other batteries, and replace seals in the first stage liquid oxygen propellant umbilical mechanism.
Due to the dynamic positions of Earth and the Moon, coupled with specific lighting and solar power constraints, NASA has a limited launch window until April 6 for the Artemis II mission. Should the mission not launch by then, it will be delayed by approximately three weeks until favorable conditions align once more.