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76K views · 1.5K reactions | It IS  science! Today at 4:45 p.m. EST, we’re firing up one of the four RS-25 engines that will power NASA's Space Launch System rocket to destinations like the Moon and Mars! What is an RS-25 engine? Watch this video and tune in live to see the fire, smoke and steam during today’s test: https://www.nasa.gov/live | NASA - National Aeronautics and Space Administration | Facebook

Now that’s power! The four RS-25 engines on #NASASLS are some of the most efficient engines ever built and provide more than 2 million pounds of thrust to help launch the rocket, NASA’s Orion Spacecraft and its crew to the Moon as part of the agency's #Artemis missions. Michoud is tasked with manufacturing and assembling the NASA's Space Launch System space core stage. The main propulsion system will also be assembled and integrated here, including the RS-25 engines. Learn more about the power b