Exploration Upper Stage facts for kids
The Exploration Upper Stage (EUS) is a top stage of the Space Launch System (SLS) Block 1B. It will use four RL-10 engines burning liquid oxygen and liquid hydrogen to generate 440,000 newtons (99,000 pounds-force) of thrust. The first flight of SLS with EUS will be in 2023.
Exploration Upper Stage Facts for Kids. Kiddle Encyclopedia.