8.4 m (28 ft) (LH2 tank)
5.5 m (18 ft) (LOX tank)[3]
Propellant mass
278,000 lb (126,000 kg)[4]
Empty mass
31,110 lb (14,110 kg)[5]
Engine details
Powered by
4 RL10C-3[6]
Maximum thrust
433.1 kN (97,360 lbf)
Specific impulse
460.1 seconds (vacuum)
Propellant
LOX / LH2
The Exploration Upper Stage (EUS) is a rocket stage under development that will be used for future flights of NASA's Space Launch System (SLS). Used on SLS Block 1B and Block 2, it will replace the SLS Block 1's Interim Cryogenic Propulsion Stage. The stage will be powered by four RL10C-3 engines burning liquid oxygen and liquid hydrogen to produce a total thrust of 433.1 kN (97,360 lbf). The EUS is expected to first fly on Artemis 4 in 2028.[7]
^"NASA, Boeing Finalize US$2.8 billion SLS Core Stage Contract". SpaceNews. 4 July 2014. Archived from the original on 27 July 2014. Retrieved 25 July 2014.
^"Space Launch System Fact Sheet" (PDF). NASA. Retrieved 16 May 2023.
^"1 year down, a galaxy to go". Boeing. Retrieved 12 April 2024.
The ExplorationUpperStage (EUS) is a rocket stage under development that will be used for future flights of NASA's Space Launch System (SLS). Used on...
stage, extended Space Shuttle boosters developed for Ares I and the ICPS upperstage. An improved Block 1B configuration, with the ExplorationUpper Stage...
In 2017, Exploration Mission-2 was a projected single-launch mission of a Space Launch System (SLS) Block 1B with an ExplorationUpperStage, lunar Block...
the Centaur upperstage of the Atlas V and the DCSS of the Delta IV. Three more versions are in development for the ExplorationUpperStage of the Space...
The Smart UpperStage for Innovative Exploration (SUSIE) is a proposal for a reusable spacecraft designed by ArianeGroup. It is capable of manned operations...
Artemis 8, missions will use SLS Block 1B, with a more capable ExplorationUpperStage, and a cargo hold to transport other payloads. Orion is the crew...
Interim Cryogenic Propulsion Stage used on SLS Block 1 will be replaced with the more powerful ExplorationUpperStage, increasing the rocket's trans-lunar...
existing hardware, to be replaced by the ExplorationUpperStage and BOLE boosters respectively. Production of core stages began by 2014, but was beset by numerous...
the prime contractor for the Space Launch System core stage and the ExplorationUpperStage that will be used on Space Launch System missions, and Northrop...
the ExplorationUpperStage (EUS) in the future. Formerly used on the upperstage for the Delta IV, the Centaur upperstage for Titan, the S-IV upper stage...
Artemis III before being retired in favor of the in-development ExplorationUpperStage for Artemis 4. It is powered by one Aerojet Rocketdyne RL10 engine...
Cryogenic Second Stage known as the Interim Cryogenic Propulsion Stage (ICPS). The Block 1B configuration with the ExplorationUpperStage (EUS) will be...
the SLS used the same Earth Departure Stage but development was put on hold with the 4-RL-10 ExplorationUpperStage taking its place. Both vehicles make...
NASA under the Apollo program for human exploration of the Moon. The rocket was human-rated, had three stages, and was powered by liquid fuel. Flown from...
This is a list of upperstages used on rockets. bold denotes active configurations italics denotes configurations in development Multistage rocket Apogee...
date, missions in the program are aimed at exploration of the Moon, including crewed and robotic exploration of the lunar surface. Three flights of the...
considerably more time, so the EDS was dropped in favor of the ExplorationUpperStage, which will use the much lower-thrust but already-developed RL10...
Sloss, Philip (4 March 2021). "NASA, Boeing looking to begin SLS ExplorationUpperStage manufacturing in 2021". NASASpaceFlight.com. Retrieved 26 December...
located within a Universal Stage Adapter (USA), and attached to a payload adapter connected to an ExplorationUpperStage (EUS). Once the translunar injection...
progress by Boeing on the construction of the SLS core stages, infrastructure, and ExplorationUpperStage (EUS). The OA found Boeing to be behind schedule...
the entire fully fueled lunar vehicle into lunar orbit using its ExplorationUpperStage. The ALPACA is refueled in lunar orbit in four Vulcan Centaur flights...
Artemis 1, officially Artemis I and formerly Exploration Mission-1 (EM-1), was an uncrewed Moon-orbiting mission. As the first major spaceflight of NASA's...
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