![An RS-25 engine undergoes a hot-fire test.](https://www.nasa.gov/wp-content/uploads/2023/03/rs-25_engine_test_2_0.jpg)
Space Launch System Engine Getting Ready for the Test Stand
Four RS-25 engines will power the core stage of NASA's Space Launch System (SLS) -- NASA's new heavy-lift launch vehicle.
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https://www.nasa.gov/image-detail/space-launch-system-engine-getting-ready-test-stand/
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