Watch how the Space Launch System rocket RS-25 undergoes a core stage engine test-fire. Credit: NASA's Stennis Space Center ...

The engines were built by L3Harris and sent for integration with the SLS rocket's core stage.

The first of four RS-25 engines that will power NASA’s Artemis III mission has arrived inside the Vehicle Assembly Building at Kennedy Space Center in Florida, the agency announced Thursday.

There has been only one mission of the Artemis program to date, an uncrewed test flight of the Orion spacecraft that was conducted back in 2022. Judging this solely from this perspective, you could be ...

It’s time to gather around a digital fire and celebrate the holidays in style with a Yule log video. But this isn’t just any old Yule log. The official NASA Yule log video stars four RS-25 rocket ...

First Artemis III Engine Hits Kennedy. The first of four RS-25 main engines that will power NASA’s Artemis III Space Launch System rolled into t ...

Teams at NASA’s Stennis Space Center deliver, lift, and install the first new production RS-25 engine on the Fred Haise Test Stand on Feb. 18. Credit: NASA/Danny Nowlin NASA’s Stennis Space Center ...