The sign accompanying the Lunar Orbiter engineering model. It reads
Mapping the Moon
Hanging overhead is a full-scale engineering model of the Lunar Orbiter.
In 1966 and 1967, five of these automatic probes flew to the Moon to map
potential Apollo landing sites. The orbiters could pick out much greater
detail than could be seen through Earth-based telescopes, and were instrumental
in finding landing sites that were flat and relatively crater-free.
The NASA Langley Research Center
managed the Lunar Orbiter program as part of NASA's coordinated strategy for
lunar reconnaissance in preparing for Apollo. Other programs included Ranger (a
camera-equipped crash lander) and Surveyor (a soft