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

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

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.

Welcome to Edition 9.01 of the Rocket Report! Back in January, I wrote about the 20 launches and landings we were most ...

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 ...

This week Ars hosted a live discussion with two space industry experts about the aftermath of the catastrophic explosion of ...

The Artemis II mission is set to launch four astronauts atop NASA's SLS (Space Launch System) rocket later today – and while this specific rocket is only flying on its second mission, its core stage ...

The technology could be used to send probes across interstellar space to other star systems.