o In this image from Sept. 8, 2023, two technicians at NASA’s Michoud Assembly Facility in New Orleans stand around one of the four RS-25 engines on the core stage of the agency’s SLS (Space Launch System) rocket that would fly the Artemis II mission. The RS-25 engine test looks like a bell-shaped nozzle attached to a network of pipes. The engine is being held by the horizontal engine installer so it looks like it’s lying on its side. The RS-25 engine is about the size of a large pickup truck. T图：NASA · NASA Image and Media Guidelines
