Stacking Complete for Twin Space Launch System Rocket Boosters

Twin solid rocket boosters for the Artemis I mission stacked in the Vehicle Assembly Building. (Credit: NASA/Isaac Watson)

KENNEDY SPACE CENTER, Fla. (NASA PR) — Stacking is complete for the twin Space Launch System (SLS) solid rocket boosters for NASA’s Artemis I mission. Over several weeks, workers used one of five massive cranes to place 10 booster segments and nose assemblies on the mobile launcher inside the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in Florida.

Engineers with Exploration Ground Systems placed the first segment on Nov. 21, 2020, and continued the process until the final nose assembly was placed on March 2. Prior to the arrival of the core stage, the team will finish installing electrical instrumentation and pyrotechnics, then test the systems on the boosters.

When the SLS core stage arrives at Kennedy, technicians will transport it to the VAB, and then stack it on the mobile launcher between the two boosters. The SLS will be the most powerful rocket in the world, producing up to 8.8 million pounds of thrust during its Artemis I launch.

Artemis I will be an uncrewed test of the Orion spacecraft and SLS rocket as an integrated system ahead of crewed flights to the Moon. Under the Artemis program, NASA aims to land the first woman and the next man on the Moon and establish sustainable lunar exploration.

Spaceport Upgrades Launch Kennedy Into Record-Setting Future

An aerial view of the iconic Vehicle Assembly Building (VAB) and Launch Control Center at NASA’s Kennedy Space Center in Florida on Jan. 13, 2021. The High Bay 3 in the VAB is where NASA’s Space Launch System and Orion spacecraft will be stacked on top of the mobile launcher before it is rolled out atop crawler-transporter 2 to Launch Pad 39B for launch on the agency’s Artemis I mission. (Credits: NASA/Ben Smegelsky)

By Heather L. Scott
NASA’s Kennedy Space Center

As quickly as the crewed commercial rocket lifted off the launch pad and into the night sky, a new type of space race had begun.

The November 2020 launch of astronauts from NASA’s Kennedy Space Center on the first operational mission by a commercial company was the culmination of a new form of government and industry cooperation – an example of how vibrant and diverse American space activities have become.

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Artemis I Launch Preparations Are Stacking Up

The aft segments of the Space Launch System solid rocket boosters for the Artemis I mission prepare to move from high bay 4 inside the Vehicle Assembly Building for stacking on the mobile launcher inside high bay 3 at Kennedy Space Center in Florida. (Credits: NASA/Cory Huston)

By Madison Tuttle
NASA’s Kennedy Space Center


NASA has stacked the first piece of the Space Launch System (SLS) rocket on the mobile launcher in preparation for the Artemis I launch next year. At NASA’s Kennedy Space Center in Florida, engineers lowered the first of 10 segments into place Nov. 21 for the twin solid rocket boosters that will power the first flight of the agency’s new deep space rocket. Artemis I will be an uncrewed flight to test the SLS rocket and Orion spacecraft as an integrated system ahead of crewed flights to the Moon with the Artemis program.

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NASA Prepares To Send Artemis I Booster Segments to Kennedy for Stacking

Artemis I solid rocket booster. (Credit: Northrop Grumman)

PROMONTORY POINT, Utah (NASA PR) — As it soars off the launch pad for the Artemis I missions, NASA’s Space Launch System (SLS) rocket is powered by two solid rocket boosters. Critical parts of the booster will soon head to NASA’s Kennedy Space Center in Florida in preparation for the Artemis I launch.

Specialized transporters move each of the 10 solid rocket motor segments from the Northrop Grumman facility in their Promontory Point, Utah, to a departure point where they will leave for NASA’s Kennedy Space Center in Florida. The cross-country journey is an important milestone toward the first launch of NASA’s Artemis lunar program.

Exploration Ground Systems teams at Kennedy will begin processing the segments with the forward and aft parts of the booster previously assembled in the Booster Fabrication Facility on site at Kennedy.

When the boosters arrive, they are moved into the Rotation, Processing and Surge Facility (RPSF) that in the past to processed shuttle booster segments. Initial stacking of the aft assembly will occur here, and then booster segments will be kept at the RPSF until stacking on the mobile launcher inside Kennedy’s Vehicle Assembly Building.

NASA is working to land the first woman and the next man on the Moon by 2024. SLS, along with NASA’s Orion spacecraft, the Human Landing System and the Gateway in orbit around the Moon, are NASA’s backbone for deep space exploration. SLS is the only rocket that can send Orion, astronauts and cargo to the Moon on a single mission.

Northrop Grumman Becomes First Commercial Partner to Use Vehicle Assembly Building

From left to right, Kennedy Space Center Director Bob Cabana, Northrop Grumman Vice President and OmegA Capture Lead Kent Rominger, and Col. Thomas Ste. Marie, vice commander of the U.S. Air Force’s 45th Space Wing, cut the ribbon in High Bay 2. (Credits: NASA/Kim Shiflett)

KENNEDY SPACE CENTER, Fla. (NASA PR) — After spending more than 50 years supporting NASA’s human spaceflight programs, the Vehicle Assembly Building (VAB), a landmark at the agency’s Kennedy Space Center in Florida, is getting its first commercial tenant.

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