NASA to roll SLS Moon rocket to the launch pad two days early
Teslarati
AUGUST 15, 2022
NASA ultimately devised a rocket that would extrapolate Shuttle external tank technology into a larger liquid hydrogen/oxygen ‘core stage’ powered by four flight-proven, reusable Space Shuttle Main Engines (SSME; now RS-25). Lunar orbit rendezvous: A look into the not too distant future. NASASpaceflight). Richard Angle).
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