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Submission + - NASA Test Fires RS-25

William Robinson writes: NASA's main engine for Exploration Mission-1 in 2018 RS-25 was test fired. The test was the sixth of seven planned hot-fire trials for the RS-25, which also served as the main engine for NASA's now-retired space shuttle fleet. In future, four RS-25s will power the core stage of the Space Launch System (SLS) megarocket that will launch astronauts in the Orion spacecraft on missions to deep space and eventually on the journey to Mars.

They are called computers simply because computation is the only significant job that has so far been given to them.

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