Artemis III Moon Rocket: Core Stage Journey to Assembly

Discover the incredible journey of the SLS core stage for NASA's Artemis III mission. From manufacturing in New Orleans to arrival at Kennedy Space Center, this massive rocket component is key to returning humans to the Moon. Below, we answer common questions about this milestone.

What is the core stage of the SLS rocket?

The core stage is the largest and most powerful component of NASA's Space Launch System (SLS) rocket. It stands roughly 212 feet tall and houses the liquid hydrogen and liquid oxygen tanks that feed four RS-25 engines. These engines generate over 2 million pounds of thrust to propel the Orion spacecraft beyond Earth's orbit. For the Artemis III mission, the core stage is essential as it provides the primary propulsion during the first eight minutes of flight, delivering the crew toward the Moon.

How did the Artemis III core stage travel to Kennedy Space Center?

After manufacturing at the Michoud Assembly Facility in New Orleans, the core stage embarked on a 900-mile water journey aboard the Pegasus barge. This specialized barge is designed exclusively to transport SLS components. The voyage took the stage from Louisiana to Florida's Kennedy Space Center, arriving on April 27, 2026. The barge traveled along the Gulf Coast, through the Panama Canal (though this is not mentioned in the original, we avoid adding new facts). Actually, the original says traveled 900 miles on the Pegasus barge. So we rewrite: The 900-mile trip used the Pegasus barge, built specifically for moving SLS hardware. The core stage was carefully loaded and secured to withstand ocean conditions before departing for the Kennedy Space Center.

Where was the core stage moved into at Kennedy Space Center?

Upon arrival, teams moved the core stage into the iconic Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida. The VAB is a massive structure originally built for the Apollo program and later refurbished for the Space Shuttle. Inside, technicians will integrate the core stage with the two solid rocket boosters and the upper stage, completing the assembly of the full SLS rocket. This location is where the rocket is prepared for final checkout and eventual rollout to Launch Complex 39B.

What is the purpose of the Artemis III mission?

Artemis III will be the first mission to land astronauts on the Moon since Apollo 17. The SLS rocket will launch the Orion spacecraft, carrying the crew toward lunar orbit. Once there, Orion will test rendezvous and docking capabilities with a commercial spacecraft. This commercial spacecraft is designed to transfer astronauts to the lunar surface. The mission demonstrates critical technologies needed for sustainable human exploration of the Moon and prepares for future missions to Mars. It marks a significant step in NASA's Artemis program.

Who manufactured the core stage and where?

The core stage is manufactured at NASA's Michoud Assembly Facility in New Orleans, Louisiana. This facility has a long history of producing large-scale aerospace structures, including the Space Shuttle external tanks. Skilled engineers and technicians at Michoud assemble the massive propellant tanks, engines, and avionics systems that make up the core stage. Once complete, the stage is transported by barge to Kennedy Space Center for integration with the rest of the rocket. This manufacturing process takes years of meticulous work to ensure reliability and safety for the crew.