Obituary: John C. Houbolt

NASA engineer John C. Houbolt (b.1919) died on April 20. Houbolt proposed the idea of a lunar orbit rendezvous to NASA rather than having a single rocket make the trip from Earth to the Moon, land on the Moon, and return. When Houbolt’s ideas were dismissed by his supervisor, he sent a letter outlining them to an incoming administrator in 1961.