SLS and Boeing began organizational changes prior to the coronavirus disease 2019 (COVID-19) pandemic, relocating NASA people working on EUS development to Boeing offices near the program’s home ...

After a total of three Block 1 launches, the Block 1B SLS upgrade with EUS would first launch on Artemis 4; the main difference from Block 1 to Block 1B is a new, larger upper stage developed in ...

EUS enables two daily launch opportunities compared to Block 1’s more limited lunar launch availability. The Space Launch System (SLS) is a crucial component of NASA’s deep space exploration ...

A key part of the craft is a new booster section, dubbed the Exploration Upper Stage (EUS), which will boost the cargo capacity of the SLS by 40 percent. If Boeing can build it. After a two-year ...