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On Feb. 1, we fired up one of the four RS-25 engines that will power our Space Launch System rocket to destinations like the Moon and Mars.

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Did you see that start up!? Fun Fact: Hot gases exit the nozzle at 13X the speed of sound! The full-duration, 365-second test helped verify that the flight controller – the engine’s “brain” – can properly communicate with the rocket. This test also used a 3D-printed component on the engine as an ongoing effort to use advanced manufacturing techniques as a means of reducing engine construction costs. Credit: NASA
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