A major step toward launch day is complete as NASA's Artemis II astronauts ran through a countdown demonstration test.

NASA’s launch and mission teams, along with the Artemis II crew, completed a key test Dec. 20, a countdown demonstration test, ahead of the Artemis II flight around the Moon early next year.

The Orion stack sits on top of a piece called "Spacecraft Adapter" (SA). Among other things, it encapsulates the [European] Service Module's ([E]SM's) various nozzles, and provides them with standoff ...

RS-25 prime contractor L3Harris continues to ramp up production of new flight engine hardware at their Los Angeles area facility and final assembly at the Stennis Space Center. NASA certified ...