NASA has completed a 535-second test of its Space Launch System (SLS) RS-25 rocket engine to collect engine performance data. The test was conducted at NASA’s Stennis Space Center near Bay St. Louis, ...

BAY ST. LOUIS, Miss — NASA's final test of its Space Launch System (SLS) rocket to make sure it was ready to launch future Artemis Moon missions experienced early engine shutdown. The core stage ...

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Add Yahoo as a preferred source to see more of our stories on Google. NASA fired up RS-25 engine No. 20001 at the Fred Haise Test Stand at NASA’s Stennis Space Center at Bay St. Louis, Mississippi.

Despite president Donald Trump's plans to phase out Boeing's mega-expensive Space Launch System rocket for NASA, the agency is currently trundling ahead with the original plan. As Ars Technica reports ...

SLS still has helium leaks. Helium leaks have been a problem since the Space Shuttle days. It is so cold that it is hard to work with. The picture is of the ...

STENNIS space center, Miss. — Upgrades to NASA’s enormous Apollo-era test stand at Stennis Space Center are on track for ground runs of the core stage of the agency’s heavy-lift Space Launch System ...

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 ...

NASA's doing everything in its power to ensure the SLS doesn't fall even further behind schedule. Hot fire tests like this involve attaching the rocket to a test stand and running the engines to ...

HOUSTON—Aerojet Rocketdyne reports a successful test of the third of four RS-25 controllers for the quartet of space shuttle-era rocket engines that are to power the first stage of NASA’s Space Launch ...