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Final Piece of Rocket Hardware Added to Artemis I Stack

After successfully completing the integrated modal test, technicians removed the Space Launch System (SLS) rocket’s Orion stage adapter structural test article and the Mass simulator for Orion. Then, they moved the Orion stage adapter flight hardware to the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida. On Oct. 9, the Orion stage adapter was connected to the top of the Interim Cryogenic Propulsion Stage (ICPS) that provides the power to send Orion to the Moon. Soon, Orion, which rides on top of SLS, will be stacked to complete the Artemis I spaceship. Artemis I is the first integrated flight of SLS and Orion. This uncrewed flight test will be followed by Artemis II, which will be the first mission to send astronauts on a mission to orbit the Moon. Credit: NASA

The last piece of Space Launch System (SLS) rocket hardware has been added to the stack at NASA’s Kennedy Space Center in Florida. Crews with NASA’s Exploration Ground Systems and contractor Jacobs added the Orion stage adapter to the top of the rocket inside the spaceport’s Vehicle Assembly Building. To complete the Artemis I stack, crews will soon add the Orion spacecraft and its launch abort system on top of Orion stage adapter.

The Orion stage adapter, built at NASA’s Marshall Space Flight Center in Huntsville, Alabama connects Orion to the Interim Cryogenic Propulsion Stage (ICPS), which was built by Boeing and United Launch Alliance at ULA’s factory in Decatur, Alabama. During the mission, the ICPS will fire one RL10 engine in a maneuver called trans-lunar injection, or TLI, to send Orion speeding toward the Moon.

SLS in Block 1 Cargo Configuration Inside VAB

This illustration shows NASA’s Space Launch System (SLS) in its Block 1 configuration inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida. From top to bottom, the entire rocket measures about 312 feet high and has the capability of lifting payloads with a mass of more than 26 metric tons (57,000 pounds). Credit: NASA

As Orion heads to the Moon for its mission, the ICPS will separate from Orion and then deploy 10 secondary payloads that are riding to space inside the Orion stage adapter. These CubeSats have their own propulsion systems that will take them on missions to the Moon and other destinations in deep space.

While the ICPS and Orion stage adapter are making it possible for SLS to send its first science payloads to space on this uncrewed mission, they only will be used for the first three Artemis missions. The Exploration Upper Stage (EUS), a more powerful stage with four RL10 engines, will be used on future Artemis missions. The EUS can send 83,000 pounds to the Moon, which is 40 percent more weight than the ICPS. The EUS makes it possible to send Orion, astronauts, and larger and heavier co-manifested payloads to the Moon.

SLS Exploration Upper Stage Infographic

NASA’s Space Launch System (SLS) rocket delivers propulsion in stages to send NASA’s Orion spacecraft and heavy cargo to the Moon for the Artemis lunar missions. At liftoff, the core stage and twin solid rocket boosters fire to propel the rocket off the launch pad send it into orbit. Once in orbit, the upper stage provides the in-space propulsion to set the spacecraft on a precise trajectory. While the rocket’s core stage design will remain the same for each of the Artemis missions, the rocket’s upper stage is selected to meet various mission requirements and goals. For the first three Artemis missions, including the mission that will land the first woman and the next man on the Moon by 2024, SLS will utilize an interim cryogenic propulsion stage with one RL10 engine to send Orion to the Moon. Later missions with the evolved SLS Block 1B rocket configuration will use an exploration upper stage with larger fuel tanks and four RL10 engines to send a crewed Orion and large cargos to the Moon. Credit: NASA/Kevin O’Brien

Artemis I will be followed by a series of increasingly complex missions. With Artemis, NASA will land the first woman and the first person of color on the lunar surface and establish long-term exploration at the Moon in preparation for human missions to Mars. SLS and NASA’s Orion spacecraft, along with the commercial 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 supplies to the Moon in a single mission.



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