A rocket engine test is a key step to check if a rocket engine works well, is reliable, and safe. Tests happen in special facilities that can handle extreme heat, high-pressure exhaust, and dangerous fuels. The engine is fired on a test stand to measure things like thrust, fuel use, combustion stability, and how long the engine lasts under conditions like a real space launch. Tests differ based on the engine type—liquid, solid, or hybrid. For liquid engines, cold fuels like liquid hydrogen and o

Ready to see the world’s most powerful rocket come alive? 🚀 Watch this recap of NASA's Space Launch System's successful hot fire test with all four of its engines firing, just as they will during the first launch for NASA's Artemis Program this year: youtu.be/OvzeB1TI5qw | NASA - National Aeronautics and Space Administration

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