Watch NASA test the newest space launch system rocket engine

January 12, 2015 9:48 PM

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"This first hot-fire test of the RS-25 engine represents a significant effort on behalf of Stennis Space Center's A-1 test team," said Ronald Rigney.

The RS-25 isn't entirely new. It served as the main engine for the since-retired space shuttle missions. But now it's been repurposed for NASA's newest Space Launch System (SLS).

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