Smoke and fire RS 25 rocket engine test

NASA conducted a developmental test firing of the RS-25 rocket engine, on August 13 at the agency’s Stennis Space Center in Mississippi. The 535 second test was the sixth in the current series of seven-tests of the former space shuttle main engine. Four RS-25 engines will power the core stage of the new Space Launch System (SLS) rocket , which will carry humans deeper into space than ever before, including to an asteroid and Mars.