At 3:40 pm ET, we'll fire up one of the four RS-25 engines for NASA's Space Launch System, our rocket built for deep-space missions to the Moon and Mars. Today's test features an RS-25 flight controller set for use on an actual mission, engine components made with innovative manufacturing, and plenty of 🔥🔥🔥 and 💨💨💨. Watch: https://www.nasa.gov/live | NASA - National Aeronautics and Space Administration

Rocket science! Yesterday, we tested one of our RS-25 Engines…four of which will power our Space Launch System rocket deeper into space than we’ve ever gone before. Watch a recap and get the details: http://go.nasa.gov/2h3ee56 | NASA - National Aeronautics and Space Administration

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

Tomorrow, we're bringing the 🔥 by testing one of the four RS-25 engines that will power our NASA's Space Launch System 🚀rocket! But first, what is an RS-25? Discover how it will launch NASA Astronauts on missions of deep space exploration: https://go.nasa.gov/2FN8Z2p | NASA - National Aeronautics and Space Administration

Getting to the moon is going to take some heavy lifting. But the RS-25 can help get us there. | L3Harris Technologies

Due to technical difficulties during today's live stream of the RS-25 test, we are sharing a replay of the test for your viewing. -- NASA conducted its first RS-25 engine hot fire test of the new year on Jan. 19 on the Fred Haise Test Stand at Stennis Space Center. The test was the second hot fire in the latest series that began in mid-December. Each test in the series is providing valuable operational data to NASA's lead contractor, Aerojet Rocketdyne, on a variety of new engine components manu