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NASA engineer John Houbolt, as seen in 1962, shows on a blackboard his Lunar Orbit Rendezvous (LOR) concept fo… | Nasa engineer, Apollo moon missions, Moon missions
space.com
The Learned Astronomer
NASA engineer John Houbolt, as seen in 1962, shows on a blackboard his Lunar Orbit Rendezvous (LOR) concept for landing on the moon. Houbolt, 95, died on April 15, 2014.