\<COLOUR 1> COMMENTS: \<COLOUR 0> First in a successful series of five space probes dispatched to map the Moon from orbit; photographs suitable sites for the Apollo landings, as do Lunar Orbiter 2 (launched November 6, 1966) and 3 (launched February 5, 1967); Lunar orbiters 4 (launched May 4, 1967) and 5 (launched August 1, 1967) carry out more general photographic survey; the probes together return some 950 images.