The last of the Lunar Orbiters

Lunar OrbiterNASA’s final Lunar Orbiter satellite is sent to the moon, with a goal of completing the mapping of the moon’s surface left unfinished by mechanical issues with its predecessor. Lunar Orbiter 5 completes the mapping of the lunar far side and helps engineers and scientists determine signal coverage from the Earth-based tracking stations that will help NASA stay in contact with future Apollo missions to the moon.