The Centaur upper stage rocket being developed in the 1960s at the Propulsion Systems Laboratory at Lewis Research Center, now John H. Glenn Research Center. The Centaur was an ambitious rocket using liquid oxygen and liquid hydrogen. It was the first rocket to ever use hydrogen as a propulsion fuel and underwent a difficult development period. It later became a highly successful upper stage used for hundreds of NASA, commercial and military payloads.

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Keywords: centaur, center, cryogenic, laboratory, lewis, propulsion, psl, research, rocket, systems