NASA Solicitation: Space Launch System Stages Acquisition “NASA has selected a launch vehicle architecture that includes a large cryogenic (LOX/LH2) Core Stage, an Upper Stage when needed for higher performance missions, high thrust Boosters (initially, using those developed for the Ares I vehicle) for liftoff thrust, using either 3, 4, or 5 RS-25 engines on Core Stage, and using 1, 2, or 3 J-2X engines on Upper Stage. While the […]